TM 1-1520-238-T-2

HEADQUARTERS, DEPARTMENT OF THE ARMY

31 AUGUST 1992

TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATE

TROUBLESHOOTING MANAUL

FOR

ARMY MODEL

AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

SUPERSEDURE NOTICE: This manual supersedes TM 1-1520-238-T-2, dated 05 SEPTEMBER 1990,

including all changes.

DISTRIBUTION STATEMENT A:Approved for public release; distribution is unlimited.
TM 1-1520-238-T-2 

 C 8 

CHANGE 

NO. 8 } HEADQUARTERS 

DEPARTMENT OF THE ARMY 

WASHINGTON, D.C., 15 February 2002 

TECHNICAL MANUAL 

AVIATION UNIT AND INTERMEDIATE 

TROUBLESHOOTING MANUAL 

FOR 

ARMY MODEL AH-64A HELICOPTER 

NSN: (1520-01-106-9519) EIC: (RHA) 

MASTER FAILURE SYMPTOM INDEX 

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. 

OZONE DEPLETING CHEMICAL INFORMATION 

This document has been reviewed for the presence of Class I Ozone depleting chemicals. As of Change 

7 dated 27 February 1998, all references to Class I Ozone depleting chemicals have been removed from 

this document by substitution with chemicals that do not cause atmospheric Ozone depletion. 

TM 1-1520-238-T-2, 31 August 1992, is changed as follows: 

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical 

bar in the margin. An illustration change is indicated by a miniature pointing hand. 

Remove pages Insert pages 

 ------- ------- 

 i and ii i and ii 

 2-15 and 2-16 2-15 and 2-16 

 A-1 and A-2 A-1 and A-2 

2. Retain this sheet in front of manual for reference purposes. 

DISTRIBUTION: To be distributed in accordance with Initial Distribution Number (IDN) 312949 

requirements for TM 1-1520-238-T-2. 

By Order of the Secretary of the Army:

ERIC K. SHINSEKI

General, United States Army

Chief of Staff Official:

JOEL B. HUDSON

Administrative Assistant to the

Secretary of the Army

0201607
TM 1-1520-238-T-2

C 7

CHANGE

NO. 7 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 27 February 1998

TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATE

TROUBLESHOOTING MANUAL

for

ARMY MODEL AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

vii/(viii blank) vii/(viii blank)

2-97 through 2-100 2-97 through 2-100

– – – – 2-100.1/(2-100.2 blank)

2-107 and 2-108 2-107 and 2-108

2-141 through 2–144 2-141 through 2–144

– – – – 2-156.1 and 2-156.2

2-157 through 2-160 2-157 through 2-160

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

DENNIS J. REIMER

General, United States Army

Official: Chief of Staff

JOEL B. HUDSON

Administrative Assistant to the

Secretary of the Army

04808

DISTRIBUTION: 

To be distributed in accordance with initial distribution No. (IDN) 312949 requirements for

TM 11520238T2.

TM 1-1520-238-T-2

C 6

CHANGE

NO. 6 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 19 December 1997

TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATE

TROUBLESHOOTING MANUAL

for

ARMY MODEL AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

i and ii i and ii

vii/(viii blank) vii/(viii blank)

1-1 and 1-2 1-1 and 1-2

2-15 and 2-16 2-15 and 2-16

 ---- 2-16.1/(2-16.2 blank)

2-41 and 2-42 2-41 and 2-42

2-91 and 2-92 2-91 and 2-92

2-133 and 2-134 2-133 and 2-134

2-161 and 2-162 2-161 and 2-162

2-177 and 2-178 2-177 and 2-178

2-185 through 2-188 2-185 through 2-188

 ---- 2-189/(2-190 blank)

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

DENNIS J. REIMER

General, United States Army

Official: Chief of Staff

JOEL B. HUDSON

Administrative Assistant to the

Secretary of the Army

04546

DISTRIBUTION: 

To be distributed in accordance with initial distribution No. (IDN) 312949, requirements for 

TM 11520238T2.

TM 1-1520-238-T-2

C 5

CHANGE

NO. 5 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 30 September 1996

TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATE

TROUBLESHOOTING MANUAL

for

ARMY MODEL AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

i and ii i and ii

vii/(viii blank) vii/(viii blank)

2–11 and 2–12 2–11 and 2–12

2–15 through 2–18 2–15 through 2–18

2–29 through 2–34 2–29 through 2–34

 –––– 2–34.1/(2–34.2 blank)

2–35 and 2–36 2–35 and 2–36

2–55 and 2–56 2–55 and 2–56

 –––– 2–56.1/(2–56.2 blank)

2–57 and 2–58 2–57 and 2–58

2–61 and 2–62 2–61 and 2–62

 –––– 2–62.1/(2–62.2 blank)

2–87 and 2–88 2–87 and 2–88

2–91 and 2–92 2–91 and 2–92

2–94.1/(2–94.2 blank) 2–94.1/(2–94.2 blank)

2–97 and 2–98 2–97 and 2–98

(2–123 blank)/2–124 (2–123 blank)/2–124

2–151 and 2–152 2–151 and 2–152

2–157 and 2–158 2–157 and 2–158

2–161 and 2–162 2–161 and 2–162

2–169 and 2–170 2–169 and 2–170

2–181 and 2–182 2–181 and 2–182

2–185 and 2–186 2–185 and 2–186

Glossary 1 through Glossary 13/(Glossary

14 blank)

Glossary 1 through Glossary 13/(Glossary

14 blank)
TM 1-1520-238-T-2

C 5

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

DENNIS J. REIMER

General, United States Army

Official: Chief of Staff

JOEL B. HUDSON

Administrative Assistant to the

Secretary of the Army

02566

DISTRIBUTION: 

To be distributed in accordance with DA Form 12-31-E, block no. 2949, requirements for 

TM 1-1520-238-T-2
TM 1-1520-238-T-2

C 4

CHANGE

NO. 4 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 1 February 1996

TECHNICAL MANUAL

Aviation Unit and Intermediate

Troubleshooting Manual

for

ARMY MODEL AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

v and vi v and vi

vii/(viii blank) vii/(viii blank)

2–19 and 2–20 2–19 and 2–20

2–43 through 2–50 2–43 through 2–50

2–55 and 2–56 2–55 and 2–56

2–75 and 2–76 2–75 and 2–76

2–83 through 2–86 2–83 through 2–86

 –––– 2–86.1/(2–86.2 blank)

2–95 and 2–96 2–95 and 2–96

2–111 and 2–112 2–111 and 2–112

 –––– 2–122.1 and 2–122.2

2–123 and 2–124 (2–123 blank)/2–124

 –––– 2–130.1 and 2–130.2

2–131 and 2–132 (2–131 blank)/2–132

2–139 through 2–144 2–139 through 2–144

2–161 and 2–162 2–161 and 2–162

2–165 and 2–166 2–165 and (2–166 blank)

2–167 through 2–170 2–167 through 2–170

2–173 and 2–174 2–173 and 2–174

2–183 through 2–187/(2–188 blank) 2–183 through 2–188

A–1 and A–2 A–1 and A–2
TM 1-1520-238-T-2

C 4

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

DENNIS. J. REIMER

General, United States Army

Chief of Staff

01280

YVONNE M. HARRISON

Administrative Assistant to the

Secretary of the Army

Official:

DISTRIBUTION: 

To be distributed in accordance with DA Form 12-31-E, block no. 2949, requirements for

TM 1-1520-238-T-2
TM 1-1520-238-T-2

C 3

CHANGE

NO. 3 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 15 September 1993

TECHNICAL MANUAL

Aviation Unit and Intermediate

Troubleshooting Manual

for

ARMY MODEL AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

v and vi v and vi

2–5 and 2–6 2–5 and 2–6

2–171 and 2–172 2–171 and 2–172

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

GORDON R. SULLIVAN

General, United States Army

Official: Chief of Staff

MILTON H. HAMILTON

Administrative Assistant to the

Secretary of the Army

05464

DISTRIBUTION: 

To be distributed in accordance with DA Form 12-31-E, block no. 2949, requirements for 

TM 1-1520-238-T-2

URGENT TM 1-1520-238-T-2

C 2

CHANGE

NO. 2 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 7 JULY 1993

TECHNICAL MANUAL

Aviation Unit and Intermediate

Troubleshooting Manual

for

ARMY MODEL

AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

v and vi v through iii/(viii blank)

2–45 and 2–46 2–45 and 2–46

2–141 and 2–142 2–141 and 2–142

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

GORDON R. SULLIVAN

General, United States Army

Official: Chief of Staff

MILTON H. HAMILTON

Administrative Assistant to the

Secretary of the Army

03935

DISTRIBUTION: 

To be distributed in accordance with DA Form 12-31-E, block no. 2949, requirements for 

TM 1-1520-238-T-2

TM 1-1520-238-T-2

C 1

CHANGE

NO. 1 } HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D.C., 15 JANUARY 1993

TECHNICAL MANUAL

Aviation Unit and Intermediate

Troubleshooting Manual

ARMY MODEL

AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

MASTER FAILURE SYMPTOM INDEX

TM 1-1520-238-T-2, 31 August 1992, is changed as follows:

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar

in the margin. An illustration change is indicated by a miniature pointing hand.

Remove pages Insert pages

v and vi v and vi

2–1 and 2–2 2–1 and 2–2

–––– 2–2.1/(2–2.2 blank)

2–3 and 2–4 2–3 and 2–4

–––– 2–4.1/(2–4.2 blank)

2–17 and 2–18 2–17 and 2–18

2–19 and 2–20 2–19 and 2–20

2–37 and 2–38 2–37 and 2–38

2–93 and 2–94 2–93 and 2–94

–––– 2–94.1/(2–94.2 blank)

2–185 and 2–186 2–185 and 2–186

2. Retain this sheet in front of manual for reference purposes.

By Order of the Secretary of the Army:

GORDON R. SULLIVAN

General, United States Army

Official: Chief of Staff

MILTON H. HAMILTON

Administrative Assistant to the

Secretary of the Army

03454

DISTRIBUTION: 

To be distributed in accordance with DA Form 12-31-E, block no. 2949, requirements for 

TM 1-1520-238-T-2

NOTE: The portion of the text affected by the changes is indicated by

a vertical line in the outer margins of the page. Changes to

illustrations are indicated by miniature pointing hands.

Changes to wiring diagrams are indicated by shaded areas.

TM 1–1520–238–T–2

Change 8 A

Date of issue for original and change pages are:

Original 0 31 August 1992 . . . . . . . . . . . . . . . . . 

Change 1 15 January 1993 . . . . . . . . . . . . . . . 

Change 2 7 July 1993 . . . . . . . . . . . . . . . . . . . 

Change 3 15 September 1993 . . . . . . . . . . . . 

Change 4 1 February 1996 . . . . . . . . . . . . . . . 

Change 5 30 September 1996 . . . . . . . . . . . . 

Change 6 19 December 1997 . . . . . . . . . . . . . 

Change 7 27 February 1998 . . . . . . . . . . . . . . 

Change . . . . . . . . . 8 . . . . . . 15 February 2002

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 248, CONSISTING OF THE FOLLOWING:

Page *Change

No. No.

Page *Change

No. No.

Cover . . . . . . . . . . . . . . . . . . . . . . . . . . 0

Blank . . . . . . . . . . . . . . . . . . . . . . . . . . 0

A – B Added . . . . . . . . . . . . . . . . . . . . 8

i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ii – iv . . . . . . . . . . . . . . . . . . . . . . . . . . 0

v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

vi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

viii Blank . . . . . . . . . . . . . . . . . . . . . . . 7

1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

1-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1-3 – 1-7 . . . . . . . . . . . . . . . . . . . . . . . 0

1-8 Blank . . . . . . . . . . . . . . . . . . . . . . . 0

2-1 – 2-2 . . . . . . . . . . . . . . . . . . . . . . . 1

2-2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2-2.2 Blank . . . . . . . . . . . . . . . . . . . . . 1

2-3 – 2-4 . . . . . . . . . . . . . . . . . . . . . . . 1

2-4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2-4.2 Blank . . . . . . . . . . . . . . . . . . . . . 1

2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2-7 – 2-10 . . . . . . . . . . . . . . . . . . . . . . 0

2-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-12 – 2-14 . . . . . . . . . . . . . . . . . . . . . 0

2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2–16 . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2-16.1 . . . . . . . . . . . . . . . . . . . . . . . . . 6

2-16.2 Blank . . . . . . . . . . . . . . . . . . . . 6

2-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-19 – 2-20 . . . . . . . . . . . . . . . . . . . . . 4

2-21 – 2-28 . . . . . . . . . . . . . . . . . . . . . 0

2-29 – 2-31 . . . . . . . . . . . . . . . . . . . . . 5

2-32 – 2-33 . . . . . . . . . . . . . . . . . . . . . 0

2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-34.1 . . . . . . . . . . . . . . . . . . . . . . . . . 3

2-34.2 Blank . . . . . . . . . . . . . . . . . . . . 5

2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2-38 – 2-41 . . . . . . . . . . . . . . . . . . . . . 0

2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

2-46 – 2-47 . . . . . . . . . . . . . . . . . . . . . 4

2-48 – 2-49 . . . . . . . . . . . . . . . . . . . . . 0

2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-51 – 2-54 . . . . . . . . . . . . . . . . . . . . . 0

2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-56.1 . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-56.2 Blank . . . . . . . . . . . . . . . . . . . . 5

2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-58 – 2-61 . . . . . . . . . . . . . . . . . . . . . 0

2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-62.1 . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-62.2 Blank . . . . . . . . . . . . . . . . . . . . 0

2-63 – 2-75 . . . . . . . . . . . . . . . . . . . . . 0

2-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-77 – 2-83 . . . . . . . . . . . . . . . . . . . . . 0

2-84 – 2-86 . . . . . . . . . . . . . . . . . . . . . 4

2-86.1 . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-86.2 Blank . . . . . . . . . . . . . . . . . . . . 4

2-87 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-88 . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-89 – 2-90 . . . . . . . . . . . . . . . . . . . . . 0

2–91 – 2–92 . . . . . . . . . . . . . . . . . . . . 6

2-93 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-94 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2-94.1 . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-94.2 Blank . . . . . . . . . . . . . . . . . . . . 5

2-95 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-96 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-97 – 2-98 . . . . . . . . . . . . . . . . . . . . . 7

2-99 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-100 . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-100.1 . . . . . . . . . . . . . . . . . . . . . . . . 7

2-100.2 Blank . . . . . . . . . . . . . . . . . . . 7

2-101 – 2-107 . . . . . . . . . . . . . . . . . . . 0

2-108 . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-109 – 2-110 . . . . . . . . . . . . . . . . . . . 0

2-111 . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-112 – 2-122 . . . . . . . . . . . . . . . . . . . 0

*Zero in this column indicates an original page.

INSERT LATEST CHANGED PAGES: DESTROY SUPERSEDED PAGES.

LIST OF EFFECTIVE PAGES
TM 1–1520–238–T–2

B Change 8

Page *Change

No. No.

Page *Change

No. No.

2-122.1 . . . . . . . . . . . . . . . . . . . . . . . . 4

2-122.2 . . . . . . . . . . . . . . . . . . . . . . . . 0

2-123 Blank . . . . . . . . . . . . . . . . . . . . 5

2-124 . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-125 – 2-130 . . . . . . . . . . . . . . . . . . . 0

2-130.1 – 2-130.2 . . . . . . . . . . . . . . . 4

2-131 Blank . . . . . . . . . . . . . . . . . . . . 4

2-132 . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-133 . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2-134 – 2-138 . . . . . . . . . . . . . . . . . . . 0

2-139 – 2-140 . . . . . . . . . . . . . . . . . . . 4

2-141 . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-142 . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-143 – 2-144 . . . . . . . . . . . . . . . . . . . 7

2-145 – 2-150 . . . . . . . . . . . . . . . . . . . 0

2-151 . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-152 – 2-156 . . . . . . . . . . . . . . . . . . . 0

2-156.1 – 2-156.2 . . . . . . . . . . . . . . . 7

2-157 . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-158 . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-159 . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2-160 . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-161 – 2-162 . . . . . . . . . . . . . . . . . . . 6

2-163 – 2-164 . . . . . . . . . . . . . . . . . . . 0

2-165 . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-166 Blank . . . . . . . . . . . . . . . . . . . . 4

2-167 . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2-168 . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-169 – 2-170 . . . . . . . . . . . . . . . . . . . 5

2-171 . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2-172 . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-173 – 2-174 . . . . . . . . . . . . . . . . . . . 4

2-175 – 2-176 . . . . . . . . . . . . . . . . . . . 0

2-177 – 2-178 . . . . . . . . . . . . . . . . . . . 6

2-179 – 2-180 . . . . . . . . . . . . . . . . . . . 0

2-181 . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-182 . . . . . . . . . . . . . . . . . . . . . . . . . . 0

2-183 – 2-184 . . . . . . . . . . . . . . . . . . . 4

2-185 . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2-186 – 2-189 . . . . . . . . . . . . . . . . . . . 6

2-190 Blank . . . . . . . . . . . . . . . . . . . . 6

A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

A-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Glossary 1 – Glossary 2 . . . . . . . . . . 5

Glossary 3 . . . . . . . . . . . . . . . . . . . . . 0

Glossary 4 – Glossary 7 . . . . . . . . . . 5

Glossary 8 – Glossary 9 . . . . . . . . . . 0

Glossary 10 . . . . . . . . . . . . . . . . . . . . 5

Glossary 11 . . . . . . . . . . . . . . . . . . . . 0

Glossary 12 – Glossary 13 . . . . . . . 5

Glossary 14 Blank . . . . . . . . . . . . . . . 5

*Zero in this column indicates an original page.

INSERT LATEST CHANGED PAGES: DESTROY SUPERSEDED PAGES.

LIST OF EFFECTIVE PAGES
* TM 1–1520–238–T–2

Change 8 i

HEADQUARTERS

DEPARTMENT OF THE ARMY

WASHINGTON, D. C., 31 August 1992

TECHNICAL MANUAL

AVIATION UNIT AND INTERMEDIATE

TROUBLESHOOTING MANUAL

FOR

ARMY MODEL

AH-64A HELICOPTER

(NSN 1520-01-106-9519) (EIC: RHA)

REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS

You can help improve this manual. If you find any mistakes, or if you know of a way to improve the

procedures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications

and Blank Forms) direct to: Commander, U.S. Army Aviation and Missile Command, ATTN:

AMSAM–MMC–MA–NP, Redstone Arsenal, AL 35898–5230. A reply will be furnished directly to you.

You may also submit your recommended changes by E–mail directly to 2028@redstone.army.mil or by

fax 205–842–6546/DSN 788–6546. Instructions for sending an electronic 2028 may be found at the end

of this manual immediately preceding the hard copy 2028.

OZONE DEPLETING CHEMICAL INFORMATION:

This document has been reviewed for the presence of Class I Ozone depleting chemicals. As of Change 7 dated

27 February 1998, all references to Class I Ozone depleting chemicals have been removed from this document by

substitution with chemicals that do not cause atmospheric Ozone depletion.

TABLE OF CONTENTS

Page No.

HOW TO USE THIS VOLUME (cont) ii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

CHAPTER 1 INTRODUCTION 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Section I. General Information 1–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Section II. How To Use This Manual 1–2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Section III. Display Symbology Data 1–5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

CHAPTER 2 MASTER FAILURE SYMPTOM INDEX 2–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

APPENDIX A REFERENCES A–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GLOSSARY–1

* SUPERSEDURE NOTICE: This manual supersedes TM 1-1520-238-T-2, dated 05 SEPTEMBER 1990,

including all changes.
TM 1–1520–238–T–2

ii

HOW TO USE THIS VOLUME

OVERVIEW

Use this volume, TM 1–1520–238–T–2, to determine which volume or manual to use to isolate a fault when you

know the failure symptom. This volume includes an alphabetical master failure symptom index in Table 2–1. Find

the fault in the index Table 2–1. and go to the volume or manual listed the the reference column.

The reference column directs you to the maintenance operational check (MOC). Additional wiring information is

located in TM 1–1520–238–T–10. The theory of operation volume, TM 1–1520–238–T–9, provides a basic

description of how the helicopter systems work by function. Both TM 1–1520–238–T–9 and

TM 1–1520–238–T–10 are used to provide additional troubleshooting information for unanticipated faults when

symptoms or related data do not exist.

An overview of the troubleshooting procedure is provided in the following functional block diagram:

START

T2

TM SYSTEM

(MOC)

T3

T10 T9

T-1 = FAULT DETECTION / LOCATION SYSTEM (FD / LS)

T-2 = MASTER FAILURE SYMPTOM INDEX

T-3 = MULTIPLEX (MUX) READ CODES

T-9 = THEORY OF OPERATION

T-10 = WIRING DIAGRAMS

TM SYSTEM = ALL REFERENCED TM'S

ADDITIONAL TROUBLESHOOTING PATH

T1

TM SYSTEM

(FIP)

LEGEND

INTEGRATED TROUBLESHOOTING FUNCTIONAL BLOCK DIAGRAM

M51-070A
TM 1–1520–238–T–2

iii

HOW TO USE THIS VOLUME (cont)

GENERAL

If you can’t find information, you cannot do the job. Learn how to use this volume. Check how the volume is put

together. Look at the following examples and make sure you understand them before you go to the chapters of

the volume.

MASTER FAILURE SYMPTOM INDEX

The master failure symptoms listed in this volume are in alphanumeric sequence. Each entry in the master failure

system index Table 2–1. contains a failure symptom, a technical manual (TM) reference, and the MOC to isolate

the fault. An example follows.

Table 2–1. Master Failure Symptom Index

Failure Symptom Reference MOC

STAB AUTO DC CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

CHAPTERS AND SECTIONS

This volume is made up of chapters and sections. The chapters are made up of numbered paragraphs and tables.

Chapter 1 contains general information, how to use this manual, and display symbology. Chapter 2 contains

failure symptom information.

PARAGRAPHS

Paragraph numbers are in two parts. The first is the chapter number. The second is the paragraph number. Each

number is separated by a dash as shown in the example:

1–4

Paragraph

Chapter

TABLES

Chapter 2 contains Table 2–1. This table refers you to the appropriate TM reference and system MOC you should

use to isolate a fault.

TABLE NUMBERING

Table numbers have two parts. The first is the chapter number. The second is the table number. Each number is

separated by a dash as shown in the example:

2–1

Table

Chapter
TM 1–1520–238–T–2

iv

HOW TO USE THIS VOLUME (cont)

PAGE NUMBERING

All page numbering is by chapters. The first number represents the chapter and the second number represents

the page in that chapter. The numbers are separated by a dash as shown in the example:

Page

Chapter

2–1

USING AH–64A HELICOPTER EFFECTIVITY CODES

Helicopter effectivity codes designate differences between helicopters by helicopter serial numbers. These codes

consist of three letters representing various helicopter serial number blocks. They are used throughout this

volume as necessary to aid in the helicopter troubleshooting effort.

The codes are used to designate serial number block differences for applicable failure symptoms. When used

within the failure symptoms the effectivity codes appear within parenthesis.

For Example: For example: Failure Symptom (AAA).

This volume uses these effectivity codes and corresponding helicopter serial numbers for reference.

To use the helicopter effectivity codes, note the helicopter serial number on the left side of the fuselage directly

below the CPG window. Use this serial number to determine which procedure or path in a wiring interconnect

diagram or FIP to use.

The effectivity codes and helicopter serial number blocks applicable to this volume are as follows:

Effectivity Code Helicopter Serial No.

AAA 82–23355 thru 82–23365

AAB 82–23355 thru 83–23798

AAC 82–23355 thru 83–23814

AAD 85–25424 and subsequent

AAE 82–23355 thru 84–24231

AAF 84–24216 and subsequent

AAG 82–23355 thru 84–24289

AAH 82–23355 thru 85–25398

AAJ 85–25351 and subsequent

AAK 82–23355 thru 85–25488

AAL 88–0215 and subsequent

AAM 85–25465 and subsequent
TM 1–1520–238–T–2

Change 3 v

HOW TO USE THIS VOLUME (cont)

Effectivity Code Helicopter Serial No.

AAN 83–23787 thru 85–25415

AAP 82–23355 thru 88–0214

AAQ 82–23355 thru 84–24311

AAR 82–23355 thru 84–24239

AAS 84–24240 and subsequent

AAT 82–23355 thru 83–23804

AAU 83–23787 and subsequent

AAV 83–23805 and subsequent

AAW 83–23799 and subsequent

AAX 83–23799 thru 84–24245

AAY 83–23799 thru 85–25470

(Before MWO 1–1520–238–50–37)

AAZ 83–23815 and subsequent

ABA 84–24200 and subsequent

ABB 84–24246 and subsequent

ABC 84–24290 and subsequent

ABD 82–23355 thru 85–25415

ABE 82–23355 thru 84–24295

ABF 84–24296 and subsequent

ABG 85–25399 and subsequent

ABH 82–23355 thru 84–24245

ABJ 85–25447 and subsequent

ABK 82–23355 thru 85–24446

ABL 82–23355 thru 89–0215

ABM 84–24290 thru 88–0199

ABN 89–0192 and subsequent

ABP 85–25471 and subsequent

ABQ 86–8940 and subsequent

ABR 82–23355 thru 84–24232

ABS 84–24233 and subsequent

ABT 82–23355 thru 83–23816

ABU 83–23817 thru 85–25415

ABV 84–24246 thru 85–25398

ABW 82–23355 thru 83–23795

ABX 83–23796 and subsequent
TM 1–1520–238–T–2

vi Change 4

HOW TO USE THIS VOLUME (cont)

Effectivity Code Helicopter Serial No.

ABY With T700–GE 701 engines

ABZ With T700–GE 701C engines

ACA 82–23355 thru 88–0199

ACB 88–0200 and subsequent

ACC 82–23355 thru 83–23834

ACD 85–25416 and subsequent

ACE 82–23355 thru 86–9011

ACF 82–23355 thru 88–0284

ACG 89–0192 and subsequent

ACH 82–23355 thru 85–25423

ACJ 82–23355 thru 90–0290, 90–0292 thru 90–0301

(Before MWO 1–1520–238–50–07)

ACK 82–23355 thru 90–0290, 90–0292 thru 90–0301

(After MWO 1–1520–238–50–07)

90–0291, 90–0302 and subsequent

ACL 82–23355 thru 83–23814

ACM 83–23815 and subsequent

ACN 85–25471 thru 90–0448

(Before MWO 1–1520–238–50–37)

ACP 85–25471 thru 90–0448

(After MWO 1–1520–238–50–37)

90–0449 and subsequent

ACQ 82–23355 thru 90–0448

(Before MWO 1–1520–238–50–36)

ACR 82–23355 thru 90–0448 

(After MWO 1–1520–238–50–36)

90–0449 and subsequent

ACS 82–23355 thru 90–0437

ACT 90–0438 and subsequent

ACU 82–23355 thru 90–0436

ACV 89–0192 thru 90–0434 with T700–GE–701C engines

(Before MWO 1–1520–238–50–38)

ACW 89–0192 thru 90–0434 with T700–GE–701C engines

(After MWO 1–1520–238–50–38)

90–0435 and subsequent with T700–GE–701C engines

ACY 82–23355 thru 92–0485 

(Before MWO 9–1230–476–50–01)

ACZ 82–23355 thru 92–0485 

(After MWO 9–1230–476–50–01)

94–0328 and subsequent
TM 1–1520–238–T–2

Change 7 vii/(viii blank)

HOW TO USE THIS VOLUME (cont)

Effectivity Code Helicopter Serial No.

ADA Before MWO 1–1520–238–50–40

ADB After MWO 1–1520–238–50–40

ADC Before MWO 1–1520–238–50–49

ADD After MWO 1–1520–238–50–49

ADH Before MWO 1–1520–238–50–15

ADI After MWO 1–1520–238–50–15

ADN AN/APR–39(V)1 installed

ADO AN/APR–39A(V)1 installed

ADP After MWO 1–1520–238–50–50

APPENDIX

Appendix A contains a list of other manuals you might need to do your job.

GLOSSARY

The glossary contains a list of abbreviations and acronyms. An abbreviation is a shortened form of a word,

expression or phrase used to conserve space and time. Acronyms are shortened terms for several words and

usually use only the first letter of each word. Abbreviations and acronyms are defined the first time they are used

within the text of each chapter. The glossary is the place to check if there is any doubt. The glossary also contains

definitions of unusual terms that appear in this volume. Check the list of definitions if you see a word that you’re

not sure of.

TM 1–1520–238–T–2

1–1

CHAPTER 1

INTRODUCTION

CHAPTER INDEX 

Para Title Para No.

Section I. GENERAL INFORMATION

Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1

Maintenance Forms, Records and Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2

Destruction of Army Material to Prevent Enemy Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

Quality Assurance/Quality Control (QA/QC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4

Deficiency Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5

Section II. HOW TO USE THIS MANUAL

Function of Each Volume of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6

Troubleshooting Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7

Section III. DISPLAY SYMBOLOGY DATA

Data Presentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–8

Data Arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
TM 1–1520–238–T–2

1–2 Change 6

Section I. GENERAL INFORMATION

1–1. SCOPE 1–1

This volume provides an alphabetical master failure symptom index to aid in isolating and locating AVUM and/or

AVIM maintenance procedures to be used on the helicopter.

1–2. MAINTENANCE FORMS, RECORDS, AND REPORTS 1–2

Equipment maintenance forms for the Department of the Army will be those prescribed by DA PAM 738–751,

Functional Users Manual for the Army Maintenance Management System–Aircraft (TAMMS–A).

1–3. DESTRUCTION OF ARMY MATERIAL TO PREVENT ENEMY USE 1–3

Required destruction procedures are in TM 750–244–1–5.

1–4. QUALITY ASSURANCE/QUALITY CONTROL (QA/QC) 1–4

Required quality assurance information is explained in FM 55-411.

1–5. DEFICIENCY REPORTING 1–5

If your helicopter needs correction or improvement, let us know. Send us a Deficiency Report. You, the user, are

the only one who can tell us what you don’t like about your equipment. Let us know what you don’t like about the

design. Put it on a SF 368 (Deficiency Report). Mail it to us at: Commander, U.S. Army Aviation and Missile

Command, Attn: AMSAM-MMC-RE-FD, Redstone Arsenal, AL 35898-5230. A reply will be furnished to you.

Section II. HOW TO USE THIS MANUAL

1–6. FUNCTION OF EACH VOLUME OF THE MANUAL 1–6

There are ten volumes in this manual, TM 1–1520–238–T–1 through TM 1–1520–238–T–10.

NOTE

Use volume TM 1–1520–238–T–2 first when troubleshooting.

a. TM 1–1520–238–T–1, Fault Detection/Location System (FD/LS). TM 1–1520–238–T–1 is a

kneepad–sized volume which integrates all FD/LS checks, power up and power down procedures, auxiliary power

unit (APU) operating and emergency procedures, and references to the appropriate volume(s) to aid in fault

isolation.
TM 1–1520–238–T–2

1–3

1–6. FUNCTION OF EACH VOLUME OF THE MANUAL (cont) 1–6

b. TM 1–1520–238–T–2, Master Failure Symptom Index. TM 1–1520–238–T–2 lists all integrated

troubleshooting failure symptoms in alphabetical order. Each failure symptom refers you to the appropriate MOC

in another volume. Additional troubleshooting information can be found by using the display symbology data found

in chapter 1. You can refer to this volume for all types of failures, i.e., audio/visual, loss of power, short or open

exists, etc.

c. TM 1–1520–238–T–3, Multiplex (MUX) Read Codes. TM 1–1520–238–T–3 contains Multiplex (MUX)

Read Code interpretations by system. You are directed to go to this volume from MOCs in subsystem volumes.

You can use this volume as an aid to interpret MUX read codes and locate faults. You are directed to the

appropriate volume, to remove or replace a failed LRU or to a failure symptom within this volume.

d. TM 1–1520–238–T–4, Aviation Unit and Intermediate Troubleshooting Manual. TM 1–1520–238–T–4

contains system location and description, theory of operation, electrical component location and configuration

(ECLC) index, power up/power down procedures, MOCs, wiring interconnect diagrams, and fault isolation

procedures (FIPs). The following systems are covered in this volume:

• Airframe.

• Landing Gear.

• Power Plants.

• Rotors.

• Drive.

e. TM 1–1520–238–T–5, Aviation Unit and Intermediate Troubleshooting Manual. TM 1–1520–238–T–5

contains system location and description, theory of operation, ECLC index, power up/power down procedures,

MOCs, wiring interconnect diagrams, and FIPs. The following systems are covered in this volume:

• Hydraulic and Pneumatic.

• Instruments.

f. TM 1–1520–238–T–6, Aviation Unit and Intermediate Troubleshooting Manual. TM 1–1520–238–T–6

contains subsystem location and description, theory of operation, ECLC index, power up/power down procedures,

MOCs, wiring interconnect diagrams, FIPs and FD/LS NO–GO FIPs. The following system is covered in this

volume:

• Electrical.

g. TM 1–1520–238–T–7, Aviation Unit and Intermediate Troubleshooting Manual. TM 1–1520–238–T–7

contains system location and description, theory of operation, ECLC index, power up/power down procedures,

MOCs, wiring interconnect diagrams, FIPs and FD/LS NO–GO FIPs. The following systems are covered in this

volume:

• Fuel.

• Flight Control.
TM 1–1520–238–T–2

1–4

1–6. FUNCTION OF EACH VOLUME OF THE MANUAL (cont) 1–6

h. TM 1–1520–238–T–8, Aviation Unit and Intermediate Troubleshooting Manual. TM 1–1520–238–T–8

contains system location and description, theory of operation, ECLC index, power up/power down procedures,

MOCs, wiring interconnect diagrams, FIPs and FD/LS NO–GO FIPs. The following systems are covered in this

volume:

• Utility.

• Environmental Control.

• Hoists and Winches (not applicable).

• Auxiliary Power Unit.

• Mission Equipment.

i. TM 1–1520–238–T–9, Theory of Operation. TM 1–1520–238–T–9 contains description and theory of

operation for each aircraft system. This information includes signal flow diagrams for major system functions and

explanatory text with the appropriate signal name for each input or output. This information can be used to isolate

unanticipated faults for failure symptoms or related data which do not exist.

j. TM 1–1520–238–T–10, Wiring Diagrams. TM 1–1520–238–T–10 provides point–to–point wiring for

each aircraft system. The diagrams show LRUs, cable interfaces, splices, shielding, ground studs, etc. Each cable

location and connection can be found in the wire harness location and routing diagrams. This volume also

contains connector end view diagrams and a symbol chart for the various wiring diagram symbols used.

k. Summary. By using these volumes, you will be able to perform inclusive troubleshooting on the

helicopter. TM 1–1520–238–T–2 directs you to the appropriate volume when you know the failure symptom.

TM 1–1520–238–T–1, and TM 1–1520–238–T–3 through TM 1–1520–238–T–8 aid you in isolating faults and

making repairs. TM 1–1520–238–T–9 and TM 1–1520–238–T–10 give you additional information to help you

troubleshoot the helicopter.

1–7. TROUBLESHOOTING EXAMPLES 1–7

The following troubleshooting examples illustrate how the volumes should be used together to locate and isolate

faults.

a. Example Using TM 1–1520–238–T–3 Multiplex (MUX) Read Code Volume.

(1) Assume the following failure symptom is known – ADS INDICATOR LIGHTS (PILOT ANTI ICE PANEL:

PITOT ICE DET AD SNSR SWITCH SET TO OFF).

(2) Find the failure symptom in the master failure symptom index Table 2–1., TM 1–1520–238–T–2. (The

Reference column specifies TM 9–1230–476–20–2, and the MOC column specifies AIR DATA SYSTEM.)

(3) Refer to TM 9–1230–476–20–2 and read HOW TO USE THIS MANUAL and chapter 1 to become

familiar with the manual.

(4) Go to the MOC (para 3–14), AIR DATA SYSTEM – MAINTENANCE OPERATIONAL CHECK.

(5) Perform the MOC in paragraph 3–14. Step b. in the Task column instructs you to verify PITOT ICE

DET AD SNSR switch is OFF and CPG AUX/ANTI–ICE panel ADSS switch is set to ADSS position. The Result

column directs you to TM 1–1520–238–T–3 to perform troubleshooting. Then if no fault is found, go to the

paragraph indicated.
TM 1–1520–238–T–2

1–5

1–7. TROUBLESHOOTING EXAMPLES (cont) 1–7

(6) Refer to TM 1–1520–238–T–3 and read HOW TO USE THIS VOLUME and chapter 1 to become

familiar with the volume.

(7) In TM 1–1520–238–T–3, go to chapter 2 (Air Data System (ADS) Multiplex Read Codes).

(8) Find the symptom in the master failure symptom index. (The Refer to paragraph column specifies

para 2–1.)

(9) Go to paragraph 2–1 and enter the specified memory location code. (For this example, assume a FAIL

occurs at para 2–2.)

(10) Troubleshoot using the system manual (TM 9–1230–476–20–2) as instructed in paragraph 2–2.

b. Example Using System Volume.

(1) Assume the following failure symptom is known – Pilot TGT indicator vertical scales or digital readouts

do not indicate ambient temperature (±5°).

(2) Find the failure symptom in the master failure symptom index Table 2–1. (The Reference column

specifies TM 1–1520–238–T–5, and the MOC column specifies ENGINE INSTRUMENTS.)

(3) Refer to TM 1–1520–238–T–5 and read HOW TO USE THIS VOLUME and chapter 1 to become

familiar with the volume.

(4) Go to ENGINE INSTRUMENTS – MAINTENANCE OPERATIONAL CHECK (para 8–10).

(5) Perform the MOC. Step m. in the Task column instructs you to rotate DIM control to midposition and

check all pilot engine instruments. The Result column directs you to a FIP if the failure symptom in step (1) of this

example still exists.

(6) Perform the indicated FIP to correct problem.

Section III. DISPLAY SYMBOLOGY DATA

1–8. DATA PRESENTATION 1–8

Often you will track a fault by analyzing the display symbology and readouts on the pilot video display unit (VDU)

and CPG heads out display (HOD). The following figures help you locate precisely where a piece of symbology

appears on the VDU and the HOD.

1–9. DATA ARRANGEMENT 1–9

The figures provide symbol nomenclature, applicable subsystem in parentheses, and the item number in the

corresponding figure.

a. Pilot helmet display unit (HDU) and VDU display symbology data is provided in figure 1–1.

b. CPG HDU and HOD symbology data is provided in figure 1–2.
TM 1–1520–238–T–2

1–6

1–9. DATA ARRANGEMENT (cont) 1–9

1. LOS RETICLE (PNVS)

2. ALTERNATE SENSOR BEARING (TADS)

3. LUBBER LINE (NAVIGATION)

4. CUEING DOTS (PNVS)

5. COMMAND HEADING (NAVIGATION)

6. ACCELERATION CUE (NAVIGATION)

7. VELOCITY VECTOR (NAVIGATION)

8. HEADING SCALE (NAVIGATION)

9. CUED LOS RETICLE (PNVS)

10. MISSILE CONSTRAINTS (MISSILES)

11. RADAR ALTITUDE (NAVIGATION)

12. RATE OF CLIMB (NAVIGATION)

13. RADAR ALTITUDE VERTICAL TAPE (NAVIGATION)

14. RATE OF CLIMB (NAVIGATION)

15. SKID/SLIP LUBBER LINES (NAVIGATION)

16. SKID/SLIP BALL (NAVIGATION)

17. CUED LOS DOT (PNVS)

18. FIELD OF VIEW (PNVS)

19. SENSOR FIELD OF REGARD (PNVS)

20. HIGH ACTION DISPLAY (MULTIPLEX)

21. ROCKET STEERING CURSOR (ROCKETS)

22. HOVER POSITION BOX (NAVIGATION)

23. HEAD TRACKER (NAVIGATION)

24. AIRSPEED (AIR DATA)

25. HORIZON LINE (NAVIGATION)

26. ENGINE TORQUE (POWER PLANTS)

M51-122

1 2 3 4 56 7 8

9

10

11

12

13

14

20 19 18 17 16 15

21

22

23

24

25

26

Figure 1–1. Pilot HDU and VDU Display Symbology
TM 1–1520–238–T–2

1–7/(1–8 blank)

1–9. DATA ARRANGEMENT (cont) 1–9

M51-123

1. ALTERNATE SENSOR BEARING (PNVS)

2. LUBBER LINE (NAVIGATION)

3. COMMAND HEADING (NAVIGATION)

4. HEADING SCALE (NAVIGATION)

5. CUED LOS RETICLE (TADS)

6. MISSILE CONSTRAINTS (TADS)

7. RADAR ALTITUDE (NAVIGATION)

8. FIELD OF VIEW (TADS)

9. CUED LOS DOT (TADS)

10. SENSOR FIELD OF REGARD (TADS)

11. CUEING DOTS (TADS)

12. AIRSPEED (AIR DATA)

13. LOS RETICLE (TADS)

14. HIGH ACTION DISPLAY (MULTIPLEX)

15. TADS FOV GATES (TADS)

16. ROCKET STEERING CURSOR (TADS)

17. SELECTED SENSOR (TADS)

12 34

5

9 8 7 6 13 12 11 10 14

15

16

17

Figure 1–2. CPG HDU and HOD Display Symbology

TM 1–1520–238–T–2

Change 1 2–1

CHAPTER 2

MASTER FAILURE SYMPTOM INDEX

INTRODUCTION

Chapter 2 contains failure symptoms and references for troubleshooting all systems for the following:

• Power is not available to the equipment.

• Circuit breakers do not stay closed.

• Panel edge-light failure.

• Caution and warning indicators lighting.

• Maintenance FD/LS NO-GO messages.

• Missing or improper display symbology.

• Audio/visual faults.

Table 2–1. Master Failure Symptom Index 

Failure Symptom Reference MOC

1000 HZ TONE IS NOT HEARD (ADF CONTROL

PANEL: MODE CONTROL SET TO ANT,

MAN/2128/500 CONTROL SET TO MAN,

FREQUENCY CONTROLS SET TO DESIRED

STATION, TEST/TONE SWITCH SET TO

CENTER AND VOL CONTROL SET AS

DESIRED)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

115 VAC IS NOT PRESENT FROM AC ELEC

UTIL PWR CIRCUIT BREAKER (CB6)

(EXTERNAL ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 EXTERNAL POWER

AND GROUND

SERVICE UTILITY

RECEPTACLE

0200 CANNOT BE ENTERED INTO RC/MC

(RUN/LOAD SWITCH HELD TO LOAD)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

12D IS NOT DISPLAYED ON THE CENTER

DISPLAY (CPG DPLR NAV PANEL: DISPLAY

SWITCH SET TO DEST/TGT, DEST DISP

THUMBWHEEL SET TO P AND KEYBOARD

KEYS ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

12L IS NOT DISPLAYED ON CENTER DISPLAY

(CPG DPLR NAV PANEL: DISPLAY SWITCH

SET TO DEST/TGT, DEST DISP

THUMBWHEEL SET TO P AND KEYBOARD

KEYS ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

2 OR MORE PYLONS DO NOT MOVE (PYLON

ACTG SWITCH SET TO UP AND THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL
TM 1–1520–238–T–2

2–2 Change 1

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

26 VAC EXCITATION XFMR 1 NO–GO AFT

AVIONICS BAY APPEARS ON HOD

TM 1–1520–238–T–7 DASE

26 VAC EXCITATION XFMR 2 NO–GO AFT

AVIONICS BAY APPEARS ON HOD

TM 1–1520–238–T–7 DASE

28 VDC BUCS NO–GO APPEARS ON HOD TM 1–1520–238–T–7 DASE

28 VDC IS NOT PRESENT (CPG COLLECTIVE

STICK: ST JTSN SWITCH PRESSED AND

RELEASED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

28 VDC IS NOT PRESENT FROM DC ELEC UTIL

PWR CIRCUIT BREAKER (CB7) (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 EXTERNAL POWER

AND GROUND

SERVICE

28 VDC IS NOT PRESENT ON METER AND

LAMP DOES NOT LIGHT (PILOT

COLLECTIVE STICK: ST JTSN SWITCH

PRESSED AND RELEASED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

28 VDC IS NOT PRESENT (PILOT COLLECTIVE

STICK: ST JTSN SWITCH PRESSED AND

RELEASED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

28 VDC IS NOT PRESENT (PILOT STORES JETT

PANEL: STORES JETT SWITCH CLOSED UP

AND RELEASED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

800 HZ TONE IS NOT HEARD (ADF RCVR

CONTROL PANEL: MODE SWITCH SET TO

CW)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF)

ABNORMAL AFT STROBE APPEARS (RADAR

WARNING CONTROL PANEL: DSCRM

SWITCH SET TO ON AND SELF TEST KEY

PRESSED)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

ABNORMAL FORWARD STROBE APPEARS

(RADAR WARNING CONTROL PANEL:

DSCRM SWITCH SET TO ON AND SELF

TEST KEY PRESSED)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1
TM 1–1520–238–T–2

Change 1 2–2.1/(2–2.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ACCEPT INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

FOR EACH MODE (PILOT IFF

TRANSPONDER CONTROL PANEL: MASTER

SWITCH SET TO EMER, M–1, M–2, M–3/A

AND M–C TEST SWITCHES SET TO OUT)

TM 11–1520–238–23–2 IFF SYSTEM

ACCEPT INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: MODE 4 TEST SWITCH SET TO B)

TM 11–1520–238–23–2 IFF SYSTEM

TM 1–1520–238–T–2

Change 1 2–3

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ACCEPT INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: MODE 4 TEST SWITCH SET TO ON)

TM 11–1520–238–23–2 IFF SYSTEM

ACCEPT INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: RAD TEST SWITCH SET TO RAD

TEST)

TM 11–1520–238–23–2 IFF SYSTEM

ACCEPT INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: MODE 4 SWITCH SET TO B)

(AN/APM–424 TRANSPONDER TEST SET:

TEST SEQ SWITCH PRESSED AND

RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

ADF AUDIO CANNOT BE ADJUSTED USING

VOL CONTROL (ADF CONTROL PANEL:

MODE CONTROL SET TO ANT, MAN/2128/500

CONTROL SET TO MAN, FREQUENCY

CONTROLS SET TO DESIRED STATION,

TEST/TONE SWITCH SET TO CENTER AND

VOL CONTROL SET AS DESIRED)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

ADF AUDIO IN PILOT AND CPG HEADSET IS

NOT PRESENT (ADF CONTROL PANEL:

MODE CONTROL SET TO ANT, MAN/2128/500

CONTROL SET TO MAN, FREQUENCY

CONTROLS SET TO DESIRED STATION,

TEST/TONE SWITCH SET TO CENTER AND

VOL CONTROL SET AS DESIRED)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

ADF CONTROL PANEL EDGE–LIGHT DOES

NOT LIGHT (PILOT EXT LT/INTR LT PANEL:

R/CTR CSL CONTROL SET TO BRT)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

ADF RCVR CONTROL PANEL EDGE LIGHT

DOES NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: R/CTR CSL CONTROL ROTATED TO

BRT) 

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89
TM 1–1520–238–T–2

2–4 Change 1

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ADF TRANSFORMER ASSEMBLY NAV CIRCUIT

BREAKER (CB95) DOES NOT STAY CLOSED

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

ADMIN PWR OFF PAGE IS NOT DISPLAYED

(CDU: VAB NEXT TO DISPLAYED WORD

ADMIN PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

ADS INDICATOR LIGHTS (PILOT ANTI ICE

PANEL: PITOT ICE DET AD SNSR SWITCH

SET TO OFF)

TM 9–1230–476–20–2 AIR DATA SYSTEM

ADS INDICATORS DO NOT LIGHT (PILOT

FORWARD CIRCUIT BREAKER PANEL: NAV

AIR DATA DC CIRCUIT BREAKER OPENED)

TM 9–1230–476–20–2 AIR DATA SYSTEM

ADS INDICATORS REMAIN LIGHTED (PILOT

CENTER CIRCUIT BREAKER PANEL: NAV AIR

DATA DC CIRCUIT BREAKER CLOSED)

TM 9–1230–476–20–2 AIR DATA SYSTEM

AFT AVIONICS BAY FAN IS NOT OPERATING TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

AFT CLOSED INDICATOR IS LIGHTED

(REFUELING PANEL: LVL CONT VALVES AFT

TNK SWITCH SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFT CLOSED INDICATOR IS NOT LIGHTED

(REFUELING PANEL: LVL CONT VALVES AFT

TNK SWITCH SET TO CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFTER 15 SECONDS THE FIRST TWO

POSITIONS OF THE LEFT DISPLAY DO NOT

INDICATE GO (CPG DPLR NAV PANEL: MODE

SWITCH SET TO TEST)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

AFTER 2 SECONDS TEST, JAM AND GO

INDICATORS DO NOT LIGHT AND STAY

LIGHTED FOR 3 SECONDS (PILOT

INSTRUMENT PANEL: JAM/TEST/GO/ NO–GO

INDICATOR MOMENTARILY PRESSED AND

RELEASED)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136
TM 1–1520–238–T–2

Change 1 2–4.1/(2–4.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AFTER 45–75 SECONDS IR JAM CAUTION

INDICATOR REMAINS LIGHTED (IRCM

CONTROL UNIT: ON/OFF SWITCH SET TO

ON)

TM 11–1520–238–23–2 IR JAMMER SYSTEM

AN/ALQ–144

AFT FUEL QTY INDICATION INCREASES WITH

AFT TNK SWITCH SET TO CLOSE

(REFUELING PANEL: LVL CONT VALVE

SWITCH SET TO CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFT FUEL QTY INDICATOR DOES NOT

INDICATE AFT FUEL LOAD (REFUELING

PANEL: FUEL QTY SWITCH SET TO IND ON)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

AFT FUEL QTY INDICATOR DOES NOT

INDICATE AFT FUEL LOAD (REFUELING

PANEL: FUEL QTY SWITCH SET TO IND ON)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFT FUEL QTY INDICATOR DOES NOT

INDICATE E (FUEL TRUCK UNABLE TO

DEFUEL FORWARD FUEL CELL)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

TM 1–1520–238–T–2

2–5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AFT FUEL QTY INDICATOR DOES NOT

INDICATE E (REFUELING PANEL: FUEL QTY

SWITCH SET TO OFF)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

AFT FUEL QTY INDICATOR DOES NOT

INDICATE E (REFUELING PANEL: FUEL QTY

SWITCH SET TO OFF)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFT FUEL QTY INDICATOR DOES NOT

INDICATE SAME FUEL LOAD AS PILOT FUEL

QUANTITY INDICATOR AFT VERTICAL

DISPLAY (REFUELING PANEL: REFUEL

VALVE SWITCH SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFT FUEL QTY INDICATOR DOES NOT SHOW

INCREASE DURING PRESSURE REFUELING

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

AFT VERTICAL DISPLAY SCALE ON PILOT

FUEL QUANTITY INDICATOR DOES NOT

SHOW INCREASE (PILOT FUEL PANEL: EXT

TK SWITCH SET TO ON)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

AIRCRAFT PHYSICAL DAMAGE IS EVIDENT

(APU OPERATING)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

AIRCRAFT SYMBOL DOES NOT MOVE UP AND

DOWN ON FACE OF SAI GYROSPHERE

(PILOT SAI: PULL TO CAGE KNOB ROTATED

CLOCKWISE AND COUNTERCLOCKWISE)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

AIR DATA AC OR AIR DATA DC CIRCUIT

BREAKERS DO NOT STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

AIR DATA PROCESSOR NO–GO AFT AVIONICS

BAY APPEARS ON HOD

TM 1–1520–238–T–7 DASE

AIR DATA PROCESSOR NO–GO AFT AVIONICS

BAY APPEARS ON HOD

TM 9–1230–476–20–2 AIR DATA SYSTEM

AIR DOES NOT FLOW THROUGH VENT TUBE

DURING PRESSURE REFUELING 

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING
TM 1–1520–238–T–2

2–6 Change 3

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AIRFLOW PRESENT AT SDC OVERBOARD

EXHAUST (EXTERNAL PRESSURIZED AIR

POWER APPLIED)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

AIRSPEED TRANSDUCER 1 NO–GO LH XMSN

BAY APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

AIRSPEED TRANSDUCER 2 NO–GO LH XMSN

BAY APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

ALARM AUDIO CANNOT BE HEARD IN BOTH

HEADSETS AFTER 6 SECONDS (RADAR

WARNING CONTROL UNIT: SELF TEST

SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

ALARM AUDIO IS NOT PRESENT WITHIN 6

SECONDS AFTER SECOND STROBE

APPEARS (RADAR WARNING CONTROL

UNIT: DSCRM SWITCH SET TO ON AND

SELF TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

ALARM TONE IS NOT CLEARED (TRANSMIT

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY SYSTEM

ALARM TONE IS NOT PRESENT IN HEADSETS

(PILOT IFF TRANSPONDER CONTROL

PANEL: MODE 4 SWITCH SET TO AUDIO)

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY SYSTEM

ALARM TONE IS NOT PRESENT IN HEADSETS

(RCU: C/RAD 1 SWITCH SET TO C/RAD 1)

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY SYSTEM

ALL CAUTION/WARNING INDICATORS ARE

NOT LIGHTED OR FLASHING (CPG MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

ALL CAUTION/WARNING INDICATORS ARE

NOT LIGHTED OR FLASHING (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED) 

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–7

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ALL CHANNEL 1, NO. 1 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CHANNEL 1, NO. 1 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 1, NO. 2 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CHANNEL 1, NO. 2 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 2, NO. 1 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CHANNEL 2, NO. 1 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 2, NO. 2 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 2, NO. 3 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 3, NO. 1 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS
TM 1–1520–238–T–2

2–8

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ALL CHANNEL 3, NO. 1 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 3, NO. 2 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CHANNEL 3, NO. 2 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 3, NO. 3 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 4, NO. 1 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CHANNEL 4, NO. 1 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 4, NO. 2 INDICATORS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CHANNEL 4, NO. 1 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 4, NO. 2 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS
TM 1–1520–238–T–2

2–9

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ALL CHANNEL 4, NO. 3 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CHANNEL 4, NO. 4 INDICATORS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL,

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL CPG EDGE–LIGHTS DO NOT LIGHT (CPG

INTR LT PANEL: L CSL, R CSL AND INST

CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CPG ENGINE INSTRUMENT DIGITAL

READOUTS ARE BLANKED (CPG DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH SET

TO NORM)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ALL CPG INSTRUMENT PANEL EDGE–LIGHTS

DO NOT LIGHT (CPG INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CPG ENGINE INSTRUMENTS DO NOT

INDICATE FULL SCALE OR SHOW DIGITAL

888 (CPG DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH SET TO TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ALL CPG ENGINE INSTRUMENTS HAVE EVERY

OTHER VERTICAL SCALE INDICATOR NOT

LIGHTED (CPG SDD: SELECT SWITCH SET

TO SELECT AND TEST BUTTON PRESSED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ALL CPG LEFT CONSOLE EDGE–LIGHTS ARE

NOT LIGHTED (CPG INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL CPG MASTER CAUTION/WARNING

INDICATORS ARE NOT LIGHTED (CPG

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–10

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ALL CPG RIGHT CONSOLE EDGE–LIGHTS ARE

NOT LIGHTED (CPG INTR LT PANEL: R CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

ALL DIGITAL READOUTS REMAIN LIGHTED

(CPG DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH SET TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ALL FOUR MISSILE LAUNCHER NO–GO’S

APPEARS ON HOD

TM 9–1427–475–20 HME SYSTEM

ALL GLARESHIELD SECONDARY LIGHTS

LIGHT IN ONE POSITION AND NOT THE

OTHER (CPG INTR LT PANEL: FLOOD

CONTROL ROTATED TO DIM THEN BRT)

TM 1–1520–238–T–6 CPG UTILITY AND

SECONDARY

LIGHTS

ALL NO–GO MESSAGES EXCEPT GROUP D

NO–GO APPEARS ON HOD

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

ALL PILOT ENGINE INSTRUMENTS DO NOT

INDICATE FULL SCALE OR DIGITAL 888

(PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ALL PILOT ENGINE INSTRUMENTS HAVE

EVERY OTHER VERTICAL DISPLAY LAMP

NOT LIGHTED (PILOT DIM/TEST PANEL:

DGT OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ALL PILOT FUEL QUANTITY INDICATOR LAMP

SEGMENTS ARE NOT LIGHTED (PILOT

DIM/TEST PANEL: DGT OFF/ NORM/TEST

SWITCH SET TO TST)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

ALL PILOT INSTRUMENT PANEL EDGE–

LIGHTS ARE NOT LIGHTED (PILOT EXT

LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL PILOT LEFT CONSOLE EDGE–LIGHTS ARE

NOT LIGHTED (PILOT EXT LT/INTR LT

PANEL: L CSL CONTROL ROTATED TO BRT) 

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS
TM 1–1520–238–T–2

Change 5 2–11

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ALL PILOT MASTER CAUTION/ WARNING

INDICATORS ARE NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ALL PILOT RIGHT CENTER CONSOLE

EDGE–LIGHTS DO NOT LIGHT (PILOT EXT

LT/INTR LT PANEL: R/CTR CSL ROTATED TO

BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

ALL PYLN ACTUATOR CONTROLLER NO–GO

APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT GO TO

FLIGHT STOW (ADC)

TM 1–1520–238–T–3 PYLONS

ALL PYLON ACTUATORS DO NOT GO TO

FIRING POSITION (PILOT CYCLIC STICK:

R/G/M/C SWITCH SET TO R)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT GO TO

FLIGHT STOW (CPG FC PANEL: MSL

SWITCH SET TO ON)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT GO TO

FLIGHT STOW (PYLON ACTG SWITCH SET

TO UP)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT GO TO

FLIGHT STOW (PILOT FC PANEL: RKT

SWITCH SET TO NORM)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT GO TO

FLIGHT STOW (PILOT MSL PANEL: MSL

SWITCH SET TO ON)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT GO TO

FLIGHT STOW (SQUAT SWITCH FIXTURE

INSTALLED)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL PYLON ACTUATORS DO NOT RETURN TO

GROUND STOW (PYLON ACTG SWITCH SET

TO DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

ALL SECONDARY LIGHTS LIGHT IN ONE

POSITION AND NOT IN THE OTHER (PILOT

EXT LT/INTR LT PANEL: FLOOD CONTROL

ROTATED TO DIM THEN TO BRT)

TM 1–1520–238–T–6 PILOT UTILITY AND

SECONDARY

LIGHTS
TM 1–1520–238–T–2

2–12

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ALL WAYPOINT LOCATIONS (H AND 1 THRU 19)

DO NOT CONTAIN THE FOLLOWING DATA:

LINE 1 3IT BV 6355–8711 AND LINE 2 E000.0

CL6 (CDU: FPLN FAB DISPLAY DEPRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

ANTI ICE PANEL DOES NOT BRIGHTEN (PILOT

EXT LT/INTR LT PANEL: L CSL CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

ANY DESIGNATED DISPLAY (OR A SYSTEM

NO–GO) DOES NOT APPEAR ON HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

ANY INDICATORS DO NOT LIGHT WHEN

SELECTED (CPG SDD PANEL: SELECT

SWITCH ROTATED TO EACH POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ANY SECTION OF JAM/TEST/GO/ NO–GO

INDICATOR DOES NOT LIGHT (PILOT

INSTRUMENT PANEL: JAM/TEST/GO/NO–GO

INDICATOR MOMENTARILY PRESSED AND

RELEASED)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

ANY SECTION OF JAM/TEST/GO/ NO–GO

INDICATOR DOES NOT GO OUT (PILOT

INSTRUMENT PANEL: JAM/TEST/GO/NO–GO

INDICATOR MOMENTARILY PRESSED AND

RELEASED)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

ANY SINGLE CPG ENGINE INSTRUMENT

VERTICAL SCALE INDICATOR DOES NOT

LIGHT FOR 3 SECONDS (CPG SDD: SELECT

SWITCH ROTATED TO SELECT AND TEST

SWITCH PRESSED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ANY SINGLE PILOT ENGINE INSTRUMENT

VERTICAL DISPLAY LAMP DOES NOT LIGHT

FOR 3 SECONDS (PILOT DIM/TEST PANEL:

DGT OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

APU BOOST PUMP DOES NOT OPERATE

(PILOT APU FIRE TEST PANEL:

START/RUN/OFF SWITCH SET TO RUN) 

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT
TM 1–1520–238–T–2

2–13

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

APU DOES NOT RUN AND APU NO–GO FUEL

SOL NOT ON APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO

IGNITION DOES NOT ON APPEAR ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO

IGNITION NOT OFF APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO LOW

OIL PRESSURE APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO

OVERSPEED APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO

OVERTEMP APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO PTO

CLUTCH APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO START

RELAY APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT RUN AND APU NO–GO

UNDERSPEED APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT START TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU DOES NOT START AND APU NO–GO

UNDERSPEED APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU FIRE PULL HANDLE DOES NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 1)

TM 1–1520–238–T–8 APU FIRE

DETECTION

APU FIRE PULL HANDLE DOES NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 2)

TM 1–1520–238–T–8 APU FIRE

DETECTION

APU FIRE PULL HANDLE DOES NOT LIGHT

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–14

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

APU FIRE PULL HANDLE DOES NOT LIGHT

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST SWITCH PRESSED)

TM 1–1520–238–T–8 APU FIRE

DETECTION

APU FIRE PULL HANDLE IS NOT LIGHTED

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SELECTOR SET TO 1)

TM 1–1520–238–T–8 APU FIRE

DETECTION

APU FIRE PULL HANDLE IS NOT LIGHTED

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SELECTOR SET TO 2)

TM 1–1520–238–T–8 APU FIRE

DETECTION

APU FIRE TEST PANEL EDGE–LIGHT IS NOT

LIGHTED (PILOT EXT LT/ INTR LT PANEL:

R/CTR CSL CONTROL ROTATED TO BRT)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU FUEL BOOST PUMP DOES NOT OPERATE

(PILOT APU FIRE TEST PANEL:

START/RUN/OFF SWITCH SET TO RUN)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU FUEL SHUTOFF VALVE DOES NOT CLOSE

(PILOT APU FIRE TEST PANEL:

START/RUN/OFF SWITCH SET TO OFF)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU FUEL SHUTOFF VALVE DOES NOT OPEN

(PILOT APU FIRE TEST PANEL:

START/RUN/OFF SWITCH SET TO RUN)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU FUEL SHUTOFF VALVE DOES NOT CLOSE

(PILOT BTL DISCHARGE/APU PANEL: FIRE

PULL HANDLE PULLED)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU HOLD CIRCUIT BREAKER (CB10) DOES

NOT STAY CLOSED

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU HOLD CIRCUIT BREAKER (CB10) DOES

NOT STAY CLOSED (PILOT APU FIRE TEST

PANEL: START/RUN/OFF SWITCH SET TO

OFF)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU HOLD CIRCUIT BREAKER (CB10) DOES

NOT STAY CLOSED (PILOT APU FIRE TEST

PANEL: START/RUN/OFF SWITCH SET TO

RUN)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT
TM 1–1520–238–T–2

Change 6 2–15

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

APU HOLD CIRCUIT BREAKER (CB10) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

APU ON INDICATOR IS NOT LIGHTED TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

APU ON INDICATOR IS NOT LIGHTED 60

SECONDS AFTER APU START

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU RUNS AND APU NO–GO OVERSPEED

APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU RUNS, PTO CLUTCH DOES NOT ENGAGE

AND APU GO APPEARS ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU RUNS, PTO CLUTCH DOES NOT ENGAGE

AND APU NO–GO UNDERSPEED APPEARS

ON HOD

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

APU START SEQUENCE DOES NOT BEGIN

(PILOT APU FIRE TEST PANEL: 95%/ NORM

SWITCH SET TO 95%)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

ARC–201A DOES NOT HOLD PRESET

CHANNEL OR HOLD FILL WHEN POWER

REMOVED (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)

ARC–201A PANEL LIGHTING – NOT ON (ADI) TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)

ARC–201A RADIO TRANSMIT POWER (PILOT) –

IS LOW (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)

ARC–201A RECEIVE AUDIO (PILOT) – IS NOT

PRESENT IN EITHER HEADSET (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)
TM 1–1520–238–T–2

2–16 Change 8

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ARC–201A RECEIVE AUDIO (PILOT) – IS NOT

PRESENT IN CPG HEADSET (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)

ARC–201A RECEIVE AUDIO (PILOT) – IS NOT

PRESENT IN PILOT HEADSET (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)

ARC–201A TRANSMIT AUDIO (PILOT) – IS NOT

PRESENT IN EITHER HEADSET (PILOT

TRANSMITTING) (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

AN/ARC–201A RADIO

SETS (ADI)

ARINC OUTPUT SIGNAL NO–GO MESSAGE

DISPLAYED (AN/ASN–137) (ADD)

TM 11–1520–238–23–2

TM 1–1520–238–T–3

DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

ARM INDICATOR DOES NOT LIGHT (CPG FCP:

CPG SWITCH SET TO ARM)

TM 9–1095–206–12&P DISPENSER SYSTEM

– M91 TEST SET

ARM LAMP DOES NOT GO OUT (FLAG

ASSEMBLY IS INSTALLED IN SAFETY

SWITCH ON ELECTRONIC MODULE)

TM 9–1095–206–12&P DISPENSER SYSTEM

– M91 TEST SET

ARM LAMP DOES NOT LIGHT (PILOT DCP: ARM

LAMP PRESSED)

TM 9–1095–206–12&P DISPENSER SYSTEM

– M91 TEST SET

ARM LAMP DOES NOT LIGHT (PILOT DCP:

ARM–SAFE SWITCH SET TO ARM)

TM 9–1095–206–12&P DISPENSER SYSTEM

– M91 TEST SET

ARM LAMP LIGHTS (PILOT CENTER CIRCUIT

BREAKER PANEL: CHAFF CIRCUIT

BREAKER CLOSED)

TM 9–1095–206–12&P DISPENSER SYSTEM

– M91 TEST SET

ARM LAMP ON DISPENSER CONTROL PANEL

LIGHTS (PILOT CENTER CIRCUIT BREAKER

PANEL: CHAFF CIRCUIT BREAKER CLOSED)

TM 9–1095–206–12&P DISPENSER SYSTEM

– M91 TEST SET
TM 1–1520–238–T–2

Change 6 2–16.1/(2–16.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ARM/SAFE INDICATOR IS NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 SQUAT SWITCH

SYSTEM

ARTIFICIAL HORIZON DOES NOT MOVE (RAI:

PITCH TRIM CONTROL ADJUSTED)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

ASE AC CIRCUIT BREAKER (CB18) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

ASE AC CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 1–1520–238–T–7 DASE

ASE BUCS CIRCUIT BREAKER (CB77) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT EXT/PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION

ASE BUCS CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 1–1520–238–T–7 DASE

ASE DC CIRCUIT BREAKER (CB28) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT EXT/PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION

ASE DC CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 1–1520–238–T–7 DASE

ATTD/HOVER HOLD SWITCH DOES NOT STAY

ON AND ASE INDICATOR IS LIGHTED (PILOT

ASE PANEL: ATTD/HOVER HOLD SWITCH

SET TO ON)

TM 1–1520–238–T–7 DASE

TM 1–1520–238–T–2

Change 5 2–17

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ATTD IND CIRCUIT BREAKER (CB20) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT EXT/PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

ATTD IND CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

ATT–HDG INPUT SIGNALS NO–GO

SDCC–HARS WIRING MESSAGE DISPLAYED

(AN/ASN–137) (ADD)

TM 11–1520–238–23–2

TM 1–1520–238–T–3

DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

AUDIO CANNOT BE HEARD IN BOTH

HEADSETS (CPG AND PILOT CSC PANELS:

NAV B CONTROL ACTIONED AND

ADJUSTED)

TM 11–1520–238–23–2 VIDEO RECORDER

AUDIO CANNOT BE PLAYED BACK (CPG AND

PILOT CSC PANELS: NAV B CONTROL

ACTIONED AND ADJUSTED)

TM 11–1520–238–23–2 VIDEO RECORDER

AUDIO IS HEARD BUT TUNE METER SHOWS

NO INDICATION (ADF RCVR CONTROL

PANEL: CW/VOICE/TEST SWITCH SET TO

VOICE AND MODE SWITCH SET TO COMP)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

AUDIO IS NOT HEARD AND NO TUNE METER

INDICATION IS PRESENT (ADF RCVR

CONTROL PANEL: CW/VOICE/TEST SWITCH

SET TO VOICE AND MODE SWITCH SET TO

COMP)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

AUDIO IS NOT HEARD IN PILOT OR CPG

HEADSET AND TUNE METER INDICATION IS

PRESENT (ADF RCVR CONTROL PANEL:

MODE SWITCH SET TO ANT AND

CW/VOICE/TEST SWITCH SET TO VOICE)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

AUDIO IS NOT PRESENT AND SAFE LIGHT ON

PILOT ARM/SAFE INDICATOR IS LIGHTED

(PILOT FIRE CONTROL PANEL: MASTER

SWITCH SET TO SAFE)

TM 1–1520–238–T–6 SQUAT SWITCH

SYSTEM

AUDIO IS NOT PRESENT AND SAFE LIGHT ON

PILOT ARM/SAFE INDICATOR IS NOT

LIGHTED (SQUAT SWITCH FIXTURE

INSTALLED)

TM 1–1520–238–T–6 SQUAT SWITCH

SYSTEM
TM 1–1520–238–T–2

2–18

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AUDIO IS NOT PRESENT IN ALL THREE

HEADSETS (LEFT WING MIC PTT SWITCH

PRESSED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN ALL THREE

HEADSETS (RIGHT WING MIC PTT SWITCH

PRESSED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN CPG HEADSET

(CPG CSC PANEL: ICS SELECT SWITCH SET

TO HOT MIC)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN CPG HEADSET

(PILOT CSC PANEL: ICS SELECT SWITCH

SET TO HOT MIC)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN CPG IHU

EARPHONES (PILOT CYCLIC STICK:

RADIO/ICS SWITCH PRESSED)

TM 9–1270–221–23 IHADSS

AUDIO IS NOT PRESENT IN EITHER HEADSET

(CPG CSC PANEL: ICS SELECT SWITCH SET

TO HOT MIC)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN EITHER HEADSET

(CPG CYCLIC STICK: RADIO/ICS SWITCH

SET TO ICS)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN EITHER HEADSET

(CPG CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN EITHER HEADSET

(CPG ICS RIGHT TRANSMIT FOOT SWITCH

PRESSED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN EITHER HEADSET

(CPG RADIO LEFT TRANSMIT FOOT SWITCH

PRESSED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN EITHER HEADSET

(PILOT CSC PANEL: ICS SELECT SWITCH

SET TO HOT MIC)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN EITHER HEADSET

(PILOT CYCLIC STICK: RADIO/ICS SWITCH

SET TO ICS)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)
TM 1–1520–238–T–2

Change 4 2–19

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AUDIO IS NOT PRESENT IN EITHER HEADSET

(PILOT CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN LEFT WING

HEADSET (PILOT RADIO TRANSMIT FOOT

SWITCH PRESSED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN PILOT HEADSET

(PILOT CSC PANEL: ICS SELECT SWITCH

SET TO HOT MIC)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS NOT PRESENT IN PILOT IHU

EARPHONES (CPG CYCLIC STICK:

RADIO/ICS SWITCH PRESSED)

TM 9–1270–221–23 IHADSS

AUDIO IS NOT PRESENT IN RIGHT WING

HEADSET (PILOT RADIO TRANSMIT FOOT

SWITCH PRESSED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS PRESENT AND SAFE LIGHT ON

PILOT ARM/SAFE INDICATOR IS LIGHTED

(SQUAT SWITCH FIXTURE INSTALLED)

TM 1–1520–238–T–6 SQUAT SWITCH

SYSTEM

AUDIO IS PRESENT AND SAFE LIGHT ON

PILOT ARM/SAFE INDICATOR IS NOT

LIGHTED (SQUAT SWITCH FIXTURE

INSTALLED)

TM 1–1520–238–T–6 SQUAT SWITCH

SYSTEM

AUDIO IS PRESENT BUT DOES NOT VARY

(CPG CSC PANEL: VOL KNOB ADJUSTED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS PRESENT BUT DOES NOT VARY

(PILOT CSC PANEL: VOL KNOB ADJUSTED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO IS PRESENT IN EITHER WING

MAINTENANCE HEADSET (PILOT RADIO

TRANSMIT FOOT SWITCH PRESSED AND

SQUAT SWITCH FIXTURE INSTALLED)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

AUDIO TONE IS NOT HEARD IN BOTH CREW

STATIONS

TM 1–1520–238–T–7 STABILATOR
TM 1–1520–238–T–2

2–20 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AUDIO TONE IS NOT HEARD OR TUNE METER

SHOWS NO INDICATION (ADF RCVR

CONTROL PANEL: CW/VOICE/TEST SWITCH

SET TO VOICE AND MODE SWITCH SET TO

COMP)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

AUDIO TONE IS NOT HEARD (PILOT AFT

CIRCUIT BREAKER PANEL: STAB AUTO AC

AND STAB AUTO DC CIRCUIT BREAKERS

OPENED)

TM 1–1520–238–T–7 STABILATOR

AUDIO TONE IS STILL HEARD AFTER RESET

PUSHBUTTON IS PRESSED

TM 1–1520–238–T–7 STABILATOR

AUDIO VOLUME CANNOT BE ADJUSTED (ADF

RCVR CONTROL PANEL: AUDIO CONTROL

SET AS DESIRED)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

AUDIO WARNING IS HEARD (CPG MASTER

CAUTION/WARNING PANEL: ENGINE 1 OUT

INDICATOR PRESSED)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS HEARD IN BOTH PILOT

AND CPG HEADSETS (PILOT POWER

QUADRANT PANEL: ENGINE NO 1 PWR

LEVER SET TO FLY)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS HEARD IN ONE BUT NOT

THE OTHER HEADSET (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH CYCLED

FROM BATT TO EXT PWR AND BACK)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS HEARD IN ONLY ONE

HEADSET (PILOT POWER QUADRANT

PANEL: ENGINE NO 1 PWR LEVER SET TO

FLY)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS NOT HEARD IN BOTH

HEADSETS (PILOT AFT CIRCUIT BREAKER

PANEL: STAB AUTO AC CIRCUIT BREAKER

OPENED)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS NOT HEARD IN BOTH

HEADSETS (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH CYCLED FROM

BATT TO EXT PWR AND BACK)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM
TM 1–1520–238–T–2

2–21

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AUDIO WARNING IS NOT HEARD IN BOTH

HEADSETS (PILOT POWER QUADRANT:

ENGINE NO 1 PWR LEVER SET TO OFF AND

ENGINE NO 2 PWR LEVER SET TO FLY)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS NOT HEARD IN CPG

HEADSET (IFF TRANSPONDER CONTROL

PANEL: MASTER SWITCH SET TO NORM,

MODE 4 CODE SWITCH SET TO ZERO AND

MODE 4 SWITCH SET TO AUDIO)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING IS NOT HEARD IN PILOT

HEADSET (IFF TRANSPONDER CONTROL

PANEL: MASTER SWITCH SET TO NORM,

MODE 4 CODE SWITCH SET TO ZERO AND

MODE 4 SWITCH SET TO AUDIO)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING IS STILL HEARD (CPG

MASTER CAUTION/WARNING PANEL:

ENGINE 2 OUT INDICATOR PRESSED)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS STILL HEARD (PILOT

MASTER CAUTION/WARNING PANEL:

ENGINE 1 OUT INDICATOR PRESSED)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING IS STILL HEARD (PILOT

MASTER CAUTION/WARNING PANEL:

ENGINE 2 OUT INDICATOR PRESSED)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

AUDIO WARNING (PRF) IS NOT PRESENT IN

CPG HEADSET (RADAR WARNING

CONTROL UNIT: SELF TEST SWITCH

ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING (PRF) IS NOT PRESENT IN

PILOT HEADSET (RADAR WARNING

CONTROL UNIT: SELF TEST SWITCH

ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING TONE IS NOT PRESENT IN

CPG HEADSET WITH ENGINE 1 OUT AND

ENGINE 2 OUT INDICATORS LIGHTED

(PILOT CENTER CIRCUIT BREAKER PANEL:

ENG WARN CIRCUIT BREAKER CYCLED

OPEN AND CLOSED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)
TM 1–1520–238–T–2

2–22

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AUDIO WARNING TONE IS NOT PRESENT IN

EITHER HEADSET AND ENGINE 1 OUT AND

ENGINE 2 OUT INDICATORS ARE NOT

LIGHTED (PILOT CENTER CIRCUIT

BREAKER PANEL: ENG WARN CIRCUIT

BREAKER CYCLED OPEN AND CLOSED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING TONE IS NOT PRESENT IN

PILOT HEADSET (PILOT AFT CIRCUIT

BREAKER PANEL: STAB AUTO AC CIRCUIT

BREAKER CYCLED OPEN AND CLOSED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING TONE IS NOT PRESENT IN

PILOT HEADSET WITH ENGINE 1 OUT AND

ENGINE 2 OUT INDICATORS LIGHTED

(PILOT CENTER CIRCUIT BREAKER PANEL:

ENG WARN CIRCUIT BREAKER CYCLED

OPEN AND CLOSED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUDIO WARNING TONE IS NOT SILENCED

(PILOT COLLECTIVE STICK: RESET SWITCH

PRESSED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

AUX/ANTI–ICE PANEL EDGE–LIGHT DOES NOT

BRIGHTEN (CPG INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

AUXILIARY FUEL TANK PRESSURE CONTROL

VALVE DOES NOT OPEN

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

AUX PWR INDICATOR DOES NOT LIGHT (PILOT

DIM/TEST PANEL: DGT OFF/ NORM/TST

SWITCH HELD AT TST

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

AUX PWR INDICATOR DOES NOT LIGHT (PILOT

DIM/TEST PANEL: DGT OFF/ NORM/TST SET

TO NORM AND MANUAL DIM CONTROL SET

TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

AUX PWR INDICATOR LIGHTS (PILOT

DIM/TEST PANEL: DGT OFF/ NORM/TST SET

TO NORM AND MANUAL DIM CONTROL SET

TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–23

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

AWS AMMO CIRCUIT BREAKER (CB7) DOES

NOT STAY CLOSED

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS AMMO CIRCUIT BREAKER (CB7) DOES

NOT STAY CLOSED (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

CPG STATION)

AWS AWS AC CIRCUIT BREAKER (CB11) DOES

NOT STAY CLOSED

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS AWS AC CIRCUIT BREAKER (CB11) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

AWS AWS DC CIRCUIT BREAKER (CB12) DOES

NOT STAY CLOSED

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS AWS DC CIRCUIT BREAKER (CB12) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

AWS CYCLES BUT JAMS (CPG CYCLIC STICK:

TRIGGER PULLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS DOES NOT CYCLE (CPG CYCLIC STICK:

TRIGGER PULLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS DOES NOT CYCLE (ORT: TRIGGER

ACTIONED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS DOES NOT CYCLE (PILOT CYCLIC STICK:

TRIGGER ACTIONED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS MTR CIRCUIT BREAKER (CB3) DOES NOT

STAY CLOSED

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

AWS MTR CIRCUIT BREAKER (CB3) DOES NOT

STAY CLOSED (EXTERNAL ELECTRICAL

POWER APPLIED)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

CPG STATION)
TM 1–1520–238–T–2

2–24

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

BACKUP DOES NOT CHANGE TO BACKUP OFF

AND AFTER 3 SECONDS NAV TOP LEVEL

PWR ON PRESENT POSITION PAGE IS NOT

DISPLAYED WITH THE WORD MEMORY ON

DISPLAY LINE 6 (CDU: NEXT TO DISPLAYED

WORD BACKUP PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

BACKUP OFF DOES NOT CHANGE TO BACKUP

ON AND CDU DOES NOT DISPLAY NAV TOP

LEVEL POWER ON PRESENT POSITION

PAGE (CDU: NEXT TO DISPLAYED WORDS

BACKUP OFF PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

BBC IN CONTROL FD/LS NONFUNCTIONAL

POSITION APPEARS ON HOD (CPG FCP:

MUX SWITCH SET TO PRI)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BBC IN CONTROL FD/LS NONFUNCTIONAL

POSITION DOES NOT APPEAR ON HOD

(CPG FCP: MUX SWITCH SET TO SEC)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BBC IN CONTROL FD/LS NONFUNCTIONAL

POSITION DOES NOT APPEAR ON HOD AND

STANDBY (FLASHING) APPEARS ON HOD

(CPG FCP: MUX SWITCH SET TO SEC AND

CPG CIRCUIT BREAKER PANEL NO. 1: FC

FCC DC CIRCUIT BREAKER CLOSED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BBC IN CONTROL FD/LS NONFUNCTIONAL

POSITION DOES NOT APPEAR ON HOD

(CPG FCP: MUX SWITCH SET TO SEC AND

PRI BUS DETACHED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BBC IN CONTROL FD/LS NONFUNCTIONAL

POSITION REMAINS ON HOD (CPG FCP:

MUX SWITCH SET TO PRI)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BINDING OR CHATTERING OCCURS (PILOT

CYCLIC STICK: FORCE TRIM SWITCH SET

TO OFF AND FORE AND AFT MOVEMENT

APPLIED)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM
TM 1–1520–238–T–2

2–25

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

BINDING OR CHATTERING OCCURS (PILOT

CYCLIC STICK: LEFT AND RIGHT FULL

TRAVEL MOVEMENT APPLIED)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

BINDING OR CHATTERING OCCURS (PILOT

LEFT AND RIGHT DIRECTIONAL PEDALS:

FULL FORWARD MOVEMENT APPLIED)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

BITE INDICATOR ON FIRE CONTROL

COMPUTER DOES NOT RESET

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BIT IN AND PROGRESS DISPLAY DOES DOES

NOT TERMINATE (DEK: DATA ENTRY

SWITCH SET TO STANDBY AND CPG FCP:

MSL SWITCH SET TO OFF FOR TWO TO

THREE MINUTES TO ALLOW MISSILE

SEEKER SPIN DOWN, THEN MSL SWITCH

SET TO ON)

TM 9–1427–475–20 HME SYSTEM

BIT IN AND PROGRESS DOES NOT APPEAR

ON VDU (PILOT FCP: MISSILE SWITCH SET

TO ON)

TM 9–1427–475–20 HME SYSTEM

BIT IN AND PROGRESS MESSAGE DOES NOT

ALTERNATELY APPEAR ON HOD AND

ALPHA–NUMERIC DISPLAY (DEK: DATA

ENTRY SWITCH SET TO STANDBY AND CPG

FCP: MSL SWITCH SET TO OFF FOR TWO

TO THREE MINUTES TO ALLOW MISSILE

SEEKER SPIN DOWN, THEN MSL SWITCH

SET TO ON)

TM 9–1427–475–20 HME SYSTEM

BIT IN AND PROGRESS MESSAGE DOES NOT

APPEAR ON HOD (CPG FCP: MSL SWITCH

SET TO ON)

TM 9–1427–475–20 HME SYSTEM

BLADE ANTI ICE FAIL INDICATOR IS LIGHTED

(PILOT ANTI ICE PANEL: ON/OFF/TEST

SWITCH SET TO OFF AND

AUTO/TRACE/LT/MOD SWITCH SET TO

AUTO)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

BLADE DE–ICE ON INDICATOR DOES NOT

LIGHT (PILOT ANTI ICE PANEL:

ON/OFF/TEST SWITCH SET TO ON) 

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE
TM 1–1520–238–T–2

2–26

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

BLADE INDICATOR IS NOT LIGHTED

(EXTERNAL ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

BLEED AIR SHUTOFF VALVE IS IN OPEN

POSITION

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

BOOST PMP ON INDICATOR IS LIGHTED

(PILOT FUEL PANEL: BOOST SWITCH SET

TO OFF AND CROSSFEED SWITCH SET TO

NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

BOOST PMP ON INDICATOR IS LIGHTED

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO NORM, BOOST SWITCH MOVES TO

OFF AND ENG 1 SWITCH SET TO OFF)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

BOOST PMP ON INDICATOR IS LIGHTED

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO NORM, BOOST SWITCH MOVES TO

OFF AND ENG 2 SWITCH SET TO OFF)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

BOOST PMP ON INDICATOR IS NOT LIGHTED

(PILOT FUEL PANEL: BOOST SWITCH SET

TO SET OFF)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

BOOST PMP ON INDICATOR IS NOT LIGHTED

(PILOT FUEL PANEL: BOOST SWITCH SET

TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

BOOST PMP ON INDICATOR IS NOT LIGHTED

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO AFT TK, ENG 1 FUEL SWITCH SET

TO ON AND BOOST SWITCH SET TO ON)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

BOOST PMP ON INDICATOR IS NOT LIGHTED

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO AFT TK, ENG 2 FUEL SWITCH SET

TO ON AND BOOST SWITCH SET TO ON)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

BOOST PUMP DOES NOT OPERATE WITH

ORIDE SWITCH SET TO CPG (CPG FUEL

PANEL: BOOST SWITCH SET TO BOOST) 

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM
TM 1–1520–238–T–2

2–27

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

BOOST SWITCH DOES NOT MOVE TO OFF

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

BOOST SWITCH IS NOT RELEASED TO OFF

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO NORM)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

BOOST SWITCH IS NOT RELEASED TO OFF

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO NORM)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

BOOST SWITCH IS ON WITH TK SEL SWITCH

NOT SET TO FROM AFT (CPG FUEL PANEL:

TK SEL SWITCH SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

BORESITE REQUIRED REMAINS ON CPG HDU

(CPG COLLECTIVE STICK: PLT/BRSIT HMD

SWITCH SET TO BRSIT HMD)

TM 9–1270–221–23 IHADSS

BORESITE REQUIRED REMAINS ON PILOT

HDU (PILOT COLLECTIVE STICK: PLT/BRSIT

HMD SWITCH SET TO BRSIT HMD)

TM 9–1270–221–23 IHADSS

BOTH ADS INDICATORS ARE NOT LIGHTED

(CPG FIRE CONTROL PANEL: PLT/GND

ORIDE SWITCH SET TO ORIDE, CPG

ARM/SAFE SWITCH SET TO ARM AND FCC 1

MUX SWITCH SET TO ON)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

BOTH FAB NORMAL FANS ARE NOT

OPERATING (PILOT ECS PANEL: STBY FAN

SWITCH SET TO NORM)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

BOTH FAB STANDBY FANS ARE NOT

OPERATING (CPG AUX/ANTI–ICE PANEL:

STBY FAN SWITCH SET TO STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

BOTH FAB STANDBY FANS ARE NOT

OPERATING (PILOT ECS PANEL: STBY FAN

SWITCH SET TO STBY FAN) 

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM
TM 1–1520–238–T–2

2–28

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

BOTH PILOT AND CPG ARM INDICATORS DO

NOT LIGHT (CPG FCP: CPG SWITCH SET TO

ARM)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BOTH PILOT AND CPG SAFE INDICATORS DO

NOT LIGHT (CPG FCP: CPG PLT/GND

SWITCH SET TO ORIDE)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BOTH PILOT AND CPG SAFE INDICATORS DO

NOT LIGHT (CPG FCP: CPG SWITCH SET TO

SAFE)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

BOTH VERTICAL SCALES ON PILOT FUEL

QUANTITY INDICATOR DO NOT SHOW

INCREASE (PILOT FUEL PANEL: EXT TK

SWITCH SET TO ON)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

BOTH VIB GRBX INDICATORS ARE LIGHTED

(MASTER CAUTION/ WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

BOTH VIB GRBX INDICATORS LIGHT (INFLIGHT

AT 100 KNOTS)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

BOTTOM PISTON OF STABILATOR ACTUATOR

MOVES STABILATOR (PILOT COLLECTIVE

STICK: NU/ND SWITCH PULSED TO ND

UNTIL STABILATOR REACHES DOWN LIMIT)

TM 1–1520–238–T–7 STABILATOR

BOTTOM STAB ACTUATOR NO–GO TAIL

SECTION APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

BRAKES DO NOT SET (PARKING BRAKE

HANDLE PULLED)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

BRG, TTG AND DIST DATA HAVE NOT

CHANGED (CDU: NAV FAB PRESSED, 3

ENTERED ON SCRATCH PAD AND VAB NEXT

TO DISPLAYED WORDS FLY TO PRESSED) 

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137
TM 1–1520–238–T–2

Change 5 2–29

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

BRIGHTNESS OF CPG INSTRUMENT VERTICAL

SCALE INDICATORS AND DIGITAL

READOUTS DO NOT CHANGE (CPG

DIM/TEST PANEL: DGT OFF/NORM/ TST

SWITCH SET TO NORM AND MANUAL DIM

CONTROL ROTATED FULLY

COUNTERCLOCKWISE THEN FULLY

CLOCKWISE)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

BUCS FAIL AND BUCS ON INDICATORS ARE

LIGHTED (CPG COLLECTIVE STICK: BUCS

SELECT TRIGGER SWITCH HELD TO

CLOSED)

TM 1–1520–238–T–7 DASE

BUCS FAIL INDICATOR IS NOT LIGHTED (CPG

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

BUCS FAIL INDICATOR IS NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

BUCS FAIL INDICATORS ARE NOT LIGHTED

(CPG COLLECTIVE STICK: BUCS SELECT

TRIGGER SWITCH HELD TO CLOSED)

TM 1–1520–238–T–7 DASE

BUCS ON INDICATORS ARE NOT LIGHTED

(MASTER CAUTION/WARNING PANEL:

MASTER CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–7 DASE

BUCS ON INDICATORS REMAIN LIGHTED

(PILOT ASE PANEL: BUCS TST SWITCH SET

TO CPG)

TM 1–1520–238–T–7 DASE

BUCS ON INDICATORS REMAIN LIGHTED

(PILOT ASE PANEL: BUCS TST SWITCH SET

TO PLT)

TM 1–1520–238–T–7 DASE

BUCS TRACER NO–GO APPEARS ON HOD TM 1–1520–238–T–7 DASE

BUS INACTIVE (MUX SWITCH TO SEC) TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

BUS INACTIVE TERMINAL FAIL MESSAGE

DISPLAYED (AN/ASN–137) (ADD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

CANNOT LOAD TOD FROM EGI (ADD) TM 11–1520–238–23–2 UHF–AM RADIO SET

(ADD)
TM 1–1520–238–T–2

2–30 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CANOPY ANTI ICE FAIL INDICATOR LIGHTS

(PILOT ANTI ICE PANEL: CANOPY HTR

SWITCH SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

CANOPY INDICATORS ARE NOT LIGHTED AND

FLASHING (EXTERNAL ELECTRICAL POWER

APPLIED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

CANOPY TEMP CONTROLLER NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

CANOPY TEMP SENSOR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

CAP DOES NOT STAY ON ADAPTER

(PRESSURE REFUELING COMPLETED)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

CASSETTE TAPE DOES NOT REWIND WITHIN

TWO MINUTES (VIDEO RECORDER

CONTROL PANEL: MODE SWITCH SET TO

RWND)

TM 11–1520–238–23–2 VIDEO RECORDER

CAUTION/WARNING INDICATORS ARE NOT

LIGHTED (CPG MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CAUTION/WARNING INDICATORS ARE NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

CBR BLWR CIRCUIT BREAKER (CB5) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

CPG STATION)

CBR BLWR CIRCUIT BREAKER (CB94) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

PILOT STATION)

CDU CENTER DISPLAY DOES NOT CLEAR

(CPG DPLR NAV PANEL: DISPLAY SWITCH

SET TO DEST/TGT, DEST DISP

THUMBWHEEL SET TO P AND CLR KEY

ACTIONED TWICE)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128
TM 1–1520–238–T–2

Change 5 2–31

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CDU CIRCUIT BREAKER (CB6) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

CDU CIRCUIT BREAKER DOES NOT STAY

CLOSED (AN/ASN–137) (ADC)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADC)

CDU CIRCUIT BREAKER DOES NOT STAY

CLOSED (AN/ASN–137) (ADD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

CDU/DNS INTERFACE NOGO (MUX SWITCH TO

SEC) (ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

CDU DISPLAY DOES NOT CHANGE TO NAV

TOP LEVEL POWER ON PRESENT POSITION

PAGE WITHIN 3 SECONDS (CDU: VAB NEXT

TO DISPLAYED WORDS PWR OFF

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAY DOES NOT FREEZE DATA ON

SCRATCH PAD WITH CURSOR POSITION

UNDER FLASHING 5 (CDU: CLR FAB KEY

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAY LINE 6 HAS NOT CHANGED

FROM MEMORY TO BACKUP (CDU: VAB

NEXT TO DISPLAYED WORD ADMIN

PRESSED THEN VAB NEXT TO DISPLAYED

WORD BACKUP OFF PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS CDU/DNS INTERFACE NO–GO

MESSAGE (CDU: FD/LS KEY PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS DNS RAM ERASED FD/LS

INITIAL PAGE (CDU: VAB NEXT TO

DISPLAYED WORDS PWR OFF PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137
TM 1–1520–238–T–2

2–32

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CDU DISPLAYS HDG OR AC REF FAIL

MESSAGE (CDU: VAB NEXT TO DISPLAYED

WORD TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS NAV TOP LEVEL PWR UP FD/LS

PAGE (CDU: VAB NEXT TO DISPLAYED

WORDS PWR OFF PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS PITCH/ROLL FAIL MESSAGE

(CDU: VAB NEXT TO DISPLAYED WORD

TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS PROG PLUG NO–GO MESSAGE

(CDU: FD/LS KEY PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS RTA FAIL MESSAGE (CDU: VAB

NEXT TO DISPLAYED WORD TEST

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS RTA NOT CONNECTED OR

SDCC A/D FAIL MESSAGE (CDU: FD/LS KEY

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS RTA NOT CONNECTED OR

SDCC A/D FAIL MESSAGE (CDU: VAB NEXT

TO DISPLAYED WORD TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS SDCC CPU MEMORY FAIL

MESSAGE (CDU: VAB NEXT TO DISPLAYED

WORD TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS SDCC PWR SUPPLY FAIL

MESSAGE (CDU: VAB NEXT TO DISPLAYED

WORD TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137
TM 1–1520–238–T–2

2–33

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CDU DISPLAYS SDCC WRAPAROUND FAIL OR

SDCC 1553 I/O FAIL MESSAGE (CDU: VAB

NEXT TO DISPLAYED WORD TEST

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DISPLAYS SDC FAIL MESSAGE (CDU: VAB

NEXT TO DISPLAYED WORD TEST

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT ALTERNATELY DISPLAY

ERROR AND 12SVN32620377E12C5 ON

SCRATCH PAD (CDU: VAB NEXT TO

DISPLAYED WORD PPOS PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT ALTERNATELY DISPLAY

UPDATE SPHEROID AND 19 (CDU: 19

ENTERED ON SCRATCH PAD AND VAB NEXT

TO DISPLAYED WORDS FLY TO PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY CDU/DNS GO,

CURRENT HEADING, PITCH AND ROLL

VALUES (CDU: VAB NEXT TO DISPLAYED

WORD TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY FLIGHT PLAN

DICTIONARY PAGE (CDU: FPLN FAB

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY FLIGHT PLAN

DICTIONARY PAGE 7 (CDU: FPLN FAB

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY FD/LS STATUS PAGE

NO–GO (CDU: FD/LS FAB PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY FLIGHT PLAN

DICTIONARY PAGE 2 (CDU: DOWN ARROW

KEY PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137
TM 1–1520–238–T–2

2–34 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CDU DOES NOT DISPLAY HBCM ACTIVE PAGE

(CDU: VAB NEXT TO DISPLAYED WORD

START PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY HBCM READY PAGE

(CDU: VAB NEXT TO DISPLAYED WORD

HBCM PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY HBCM RESULTS

PAGE LINE 1 HBCM NO–GO AND LINE 2

EXCESSIVE MEM (CDU: VAB NEXT TO

DISPLAYED WORD STOP PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY NAV SYS TEST IN

PROGRESS MESSAGE (CDU: VAB NEXT TO

DISPLAYED WORD TEST PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU DOES NOT DISPLAY PPOS 31T BV 6355

8711 ON LINE 1 AND VAR E000.0 SPH CL6

ON LINE 2 (CDU: NAV FAB PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU EDGE LIGHT DOES NOT GO TO DIM THEN

TO BRT (CPG INTR LT PANEL: R CSL

ROTATED FROM BRT TO DIM THEN BACK

TO BRT)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU EDGE LIGHT DOES NOT LIGHT (CPG INTR

LT PANEL: R CSL CONTROL ROTATED FROM

BRT TO DIM THEN BACK TO BRT)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU INVALID CONFIGURATION IS DISPLAYED

(AN/ASN–137) (ADD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

CDU LT BUS NO–GO CPG COMPARTMENT

(ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)
TM 1–1520–238–T–2

Change 5 2–34.1/(2–34.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CDU REMAINS BLANK OR INVALID

CONFIGURATION IS DISPLAYED

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU RT BUS NO–GO CPG COMPARTMENT

(ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

CDU SCREEN DOES NOT DIM THEN BRIGHTEN

(BRT CONTROL ROTATED FULLY

COUNTERCLOCKWISE THEN BACK TO BRT)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

CDU SCREEN IS BLANK (AN/ASN–137) (ADC) TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADC)

CDU SCREEN IS BLANK (AN/ASN–137) (ADD) TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

CHAFF CIRCUIT BREAKER (CB48) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

CHAFF CIRCUIT BREAKER (CB48) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 9–1090–208–23–2 DISPENSER SYSTEM

– M92 TEST SET

TM 1–1520–238–T–2

Change 5 2–35

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CHARGER INDICATOR IS LIGHTED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO BATT)

TM 11–1520–238–23–2 BATTERY CHARGER

CHECK VALVE DOES NOT CLOSE WITH

CONTROL CABLE RELEASED FROM

HOLD–OPEN DETENT

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

CHIPS ENG 1 INDICATOR IS LIGHTED BUT NO

METAL CHIPS ARE FOUND ON THE CHIP

DETECTOR (ENGINE 1 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CHIPS ENG 1 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CHIPS ENG 2 INDICATOR IS LIGHTED BUT NO

METAL CHIPS ARE FOUND ON CHIP

DETECTOR (ENGINE 2 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

CHIPS ENG 2 INDICATOR IS LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

CHIPS MAIN XMSN INDICATOR IS LIGHTED ON

BOTH CAUTION/WARNING PANELS

(MASTER CAUTION/WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS
TM 1–1520–238–T–2

2–36

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CHIPS MAIN XMSN INDICATOR IS LIGHTED ON

CPG CAUTION/WARNING PANEL BUT NOT

ON PILOT CAUTION/WARNING PANEL

(MASTER CAUTION/WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CHIPS MAIN XMSN INDICATOR IS LIGHTED ON

PILOT CAUTION/WARNING PANEL (MASTER

CAUTION/WARNING PANELS: PRESS TO

TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CHIPS NOSE GRBX 1 INDICATOR IS LIGHTED

ON PILOT CAUTION/WARNING PANEL

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CHIPS NOSE GRBX 1 INDICATOR LIGHTS

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

CHIPS NOSE GRBX 2 INDICATOR IS LIGHTED

ON PILOT CAUTION/WARNING PANEL

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CHIPS NOSE GRBX 2 INDICATOR LIGHTS

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–5 DRIVE SYSTEM

DYNAMIC

CIPHER INDICATOR DOES NOT LIGHT

(CIPHONY PANEL: MODE SWITCH SET TO

CIPHER)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

CIPHER INDICATOR (GREEN) REMAINS

LIGHTED (CIPHONY PANEL: MODE SWITCH

SET TO PLAIN)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

CIPHONY CONTROL PANEL EDGE LIGHT DOES

NOT VARY FROM OFF TO BRIGHT (PILOT

EXT LT/INTR LT PANEL: R/CTR CSL

CONTROL ROTATED TO BRT)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT
TM 1–1520–238–T–2

Change 1 2–37

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

COLLECTIVE STICK DOES NOT TRAVEL FULL

UP AND DOWN TO RESPECTIVE STOP

(PILOT COLLECTIVE STICK: FRICTION OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

COLLECTIVE STICK EDGE–LIGHT IS NOT

LIGHTED (CPG INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

COLLECTIVE STICK EDGE–LIGHT IS NOT

LIGHTED (PILOT EXT LT/INTR LT PANEL: L

CSL CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

COMM ADF CIRCUIT BREAKER (CB65) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

COMM ADF CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

COMM ICS CIRCUIT BREAKER (CB27) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

COMM ICS CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

COMM IFF CIRCUIT BREAKER (CB29) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

COMM IFF CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT IFF TRANSPONDER

CONTROL PANEL: MASTER SWITCH SET TO

NORM)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

2–38

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

COMM KY–28 CIRCUIT BREAKER (CB30) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

COMM KY–28 CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

COMM KY–28 CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY

EQUIPMENT

COMM UHF AM CIRCUIT BREAKER (CB24)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

COMM UHF AM CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 UHF–AM RADIO SET

COMM VHF FM CIRCUIT BREAKER (CB64)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

COMM VHF FM CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CONSTANT TONE IN HEADSET DOES NOT

CHANGE TO PERIODIC TONE INDICATING

CIPHER MODE (PILOT VHF AM–FM

RECEIVER/TRANSMITTER: MODE SWITCH

SET TO TR)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

COOLING FAN TO RADAR JAMMER

RECEIVER/TRANSMITTER IS NOT HEARD

(RDRCM CONTROL UNIT: OFF/STBY/OPR

SWITCH SET TO OPR)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136
TM 1–1520–238–T–2

2–39

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CONSTANT TONE IN HEADSET DOES NOT

CHANGE TO PERIODIC TONE INDICATING

CIPHER MODE (PILOT VHF AM–FM

RECEIVER/TRANSMITTER: MODE SWITCH

SET TO TR)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

COOLING FAN TO RADAR JAMMER

RECEIVER/TRANSMITTER IS NOT HEARD

(RDRCM CONTROL UNIT: OFF/STBY/OPR

SWITCH SET TO OPR)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

CORRECT REMOTE TRANSMITTER SELECTOR

PANEL INDICATOR DOES NOT LIGHT (PILOT

CYCLIC STICK: REMOTE TRANSMITTER

SELECTOR SWITCH CYCLED)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG AIRSPEED INDICATOR EDGE– LIGHTING

DOES NOT LIGHT (CPG INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

CPG AIRSPEED INDICATOR, VSI AND

BAROMETRIC ALTIMETER EDGE– LIGHTS

DO NOT LIGHT (CPG INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

CPG ARM/SAFE INDICATOR IS NOT LIGHTED

(EXTERNAL ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CPG BAROMETRIC ALTIMETER EDGE–

LIGHTING DOES NOT LIGHT (CPG INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

CPG BAROMETRIC ALTIMETER PRESSURE

READING IS NOT WITHIN ±70 FEET OF

AMBIENT PRESSURE

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

CPG BRU TARGET DOES NOT LIGHT (CPG

FCP: BRSIT IHADSS SWITCH SET TO

IHADSS AND CPG INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 9–1270–221–23 IHADSS
TM 1–1520–238–T–2

2–40

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG BUCS FAIL INDICATOR IS LIGHTED (CPG

COLLECTIVE STICK: BUCS SELECT

TRIGGER SWITCH RELEASED)

TM 1–1520–238–T–7 DASE

CPG BUCS FAIL INDICATOR IS NOT LIGHTED

(CPG COLLECTIVE STICK: BUCS SELECT

TRIGGER SWITCH PULLED)

TM 1–1520–238–T–7 DASE

CPG BUCS ON INDICATOR IS NOT LIGHTED

(PILOT ASE PANEL: BUCS TST SWITCH SET

TO CPG)

TM 1–1520–238–T–7 DASE

CPG BUCS ON INDICATOR REMAINS LIGHTED

MORE THAN 20 SECONDS (PILOT ASE

PANEL: BUCS TST SWITCH SET TO PLT)

TM 1–1520–238–T–7 DASE

CPG BUCS SEL NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG CAUTION/WARNING EDGE–LIGHTED

PANEL IS NOT LIGHTED (CPG INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CPG CAUTION/WARNING PANEL ENG 1

INDICATOR IS LIGHTED (ENGINE 1

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CPG CAUTION/WARNING PANEL ENG 2

INDICATOR IS LIGHTED (ENGINE 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

CPG CAUTION/WARNING PANEL INDICATORS

DO NOT INCREASE IN BRIGHTNESS (CPG

INTR LT PANEL: INST CONTROL ROTATED

TO BRT)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CPG CLOCK DOES NOT RUN AFTER WINDING TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

CPG CLOCK DOES NOT RESET SWEEP HAND

AND ELAPSED TIME HAND (KNOB PUSHED

ONE TIME)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS
TM 1–1520–238–T–2

2–41

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG CLOCK DOES NOT STOP HANDS FROM

MOVING (KNOB PUSHED THREE TIMES)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

CPG CLOCK EDGE–LIGHT DOES NOT LIGHT

(CPG INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

CPG CLOCK HANDS DO NOT START MOVING

(KNOB PUSHED TWO TIMES)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

CPG CLOCK HOUR AND MINUTE HAND WILL

NOT MOVE (KNOB TURNED AND PULLED)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

CPG COLL 1 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG COLL 2 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG COLL LVDT NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG CSC PANEL EDGE LIGHT DOES NOT

LIGHT (CPG INTR LT PANEL: R CSL AND

INST CONTROLS ROTATED TO BRT)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

CPG CYCLIC GRIP NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG DAP OR HDU NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 9–1270–221–23 IHADSS

CPG DIM/TEST PANEL EDGE–LIGHTING DOES

NOT LIGHT (CPG INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG DIR 1 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG DIR 2 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG DIR LVDT NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE
TM 1–1520–238–T–2

2–42 Change 6

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG DPLR NAV PANEL EDGE LIGHT DOES

NOT DIM AND RETURN TO BRIGHT (CPG

INTR LT PANEL: R CSL CONTROL ROTATED

FROM BRT TO OFF THEN BACK TO BRT)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

CPG DPLR NAV PANEL FIRST TWO POSITIONS

OF LEFT DISPLAY DO NOT INDICATE GO

(MODE SWITCH SET TO TEST)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

CPG EMERG BATT VHF AM–FM CIRCUIT

BREAKER – DOES NOT STAY CLOSED

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 RADIO

SET (ADH)

CPG ENG 1 FIRE PULL HANDLE DOES NOT

LIGHT (CPG MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST SWITCH PRESSED)

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION

CPG ENG 1 FIRE PULL HANDLE DOES NOT

STAY IN PULLED POSITION

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION

CPG ENG 2 FIRE PULL HANDLE DOES NOT

LIGHT (CPG MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST SWITCH PRESSED)

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION

CPG ENG 2 FIRE PULL HANDLE DOES NOT

STAY IN PULLED POSITION

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION

CPG ENGINE CHOP INDICATOR DOES NOT GO

OUT (CPG POWER QUADRANT: ENGINE NO

1 PWR LEVER SET TO IDLE AND CPG

COLLECTIVE STICK: PUSHED FORWARD

AND CHOP COLLAR TURNED

COUNTERCLOCKWISE THEN RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CPG ENGINE CHOP INDICATOR DOES NOT GO

OUT (CPG POWER QUADRANT: ENGINE NO

2 PWR LEVER SET TO IDLE AND CPG

COLLECTIVE STICK: PUSHED FORWARD

AND CHOP COLLAR TURNED

COUNTERCLOCKWISE THEN RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)
TM 1–1520–238–T–2

2–43

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG ENGINE CHOP INDICATOR DOES NOT

LIGHT (CPG POWER QUADRANT: ENGINE

NO 1 PWR LEVER SET TO FLY) (CPG

COLLECTIVE STICK: PUSHED FORWARD

AND CHOP COLLAR TURNED CLOCKWISE)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CPG ENGINE INSTRUMENT INDICATORS ARE

NOT BLANKED OUT (CPG SDD PANEL:

SELECT SWITCH SET TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENGINE INSTRUMENTS HAVE EVERY

OTHER VERTICAL SCALE INDICATOR NOT

LIGHTED (CPG SDD PANEL: SELECT

SWITCH ROTATED TO SELECT AND TEST

SWITCH PRESSED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENGINE INSTRUMENT SINGLE VERTICAL

DISPLAY LAMPS DO NOT LIGHT FOR 3

SECONDS (CPG SDD PANEL: SELECT

SWITCH ROTATED TO SELECT AND TEST

SWITCH PRESSED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENGINE NO 1 PWR LEVER CANNOT BE

ADVANCED TO LOCKOUT (ENGINE 1

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CPG ENGINE NO 2 PWR LEVER CANNOT BE

ADVANCED TO LOCKOUT (ENGINE 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

CPG ENG–RTR RPM% INDICATOR DOES NOT

INDICATE ENGINE 1 NP (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENG–RTR RPM% INDICATOR DOES NOT

INDICATE ENGINE 2 NP (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENG–RTR RPM% INDICATOR DOES NOT

INDICATE FULL SCALE OR VERTICAL SCALE

INDICATORS HAVE EVERY OTHER LAMP

NOT LIGHTED (CPG DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH SET TO TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–44 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG ENG–RTR RPM% INDICATOR DOES NOT

INDICATE NR (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENG–RTR RPM% INDICATOR EDGE–

LIGHTING DOES NOT LIGHT (CPG INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG ENG–RTR RPM% INDICATOR VERTICAL

SCALE INDICATORS DO NOT INDICATE 0%

(CPG SDD PANEL: SELECT SWITCH

ROTATED TO EACH POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG FCP EDGE–LIGHTS DO NOT LIGHT (CPG

INTR LT PANEL: L CSL AND R CSL

CONTROLS SET TO DESIRED LEVEL)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

CPG FIRE APU INDICATOR DOES NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 1)

TM 1–1520–238–T–8 APU FIRE

DETECTION

CPG FIRE APU INDICATOR LIGHTS (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST SWITCH PRESSED)

TM 1–1520–238–T–8 APU FIRE

DETECTION

CPG FIRE CONTROL PANEL NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

CPG FIRE EXTINGUISHER PANEL EDGE–LIGHT

DOES NOT BRIGHTEN (CPG INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION

CPG FUEL LOW FWD INDICATOR IS NOT

LIGHTED WITH PILOT FUEL LOW FWD

INDICATOR LIGHTED (PILOT FUEL PANEL:

TRANS SWITCH SET TO AFT)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

CPG FUEL PANEL EDGE–LIGHTS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

CPG FUEL XFER ADVISORY LIGHT IS NOT

LIGHTED

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

Change 2 2–45

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG FUEL XFER ADVISORY LIGHT IS NOT

LIGHTED (PILOT FUEL PANEL: TRANS

SWITCH SET TO AFT TK)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

CPG GLARESHIELD SECONDARY LIGHTS

LIGHT IN ONE POSITION AND NOT OTHER

(CPG INTR LT PANEL: FLOOD CONTROL

ROTATED TO DIM AND THEN TO BRT)

TM 1–1520–238–T–6 CPG UTILITY AND

SECONDARY

LIGHTS

CPG GUN INDICATOR IS NOT LIGHTED (CPG

FIRE CONTROL PANEL: GUN SWITCH SET

TO NORM) (ORT: WAS SET TO GUN)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CPG GUN INDICATOR LIGHTS OR GUN FAIL

APPEARS ON HOD (CPG CYCLIC STICK:

R/G/M/C SWITCH SET TO G)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

CPG GUN INDICATOR REMAINS LIT (CPG

CYCLIC STICK: TRIGGER PULLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

CPG GUN INDICATOR REMAINS LIT OR GUN

FAIL REMAINS ON HOD (ORT: TRIGGER

PULLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

CPG HDU IS BLANK (ORT: GS SWITCH SET TO

DOWN AND DSPL BRT AND DSPL CONT

CONTROLS ADJUSTED)

TM 9–1270–221–23 IHADSS

CPG HELMET ELECTRONICS NO–GO

APPEARS ON HOD

TM 9–1270–221–23 IHADSS

CPG HIGH RPM ROTOR INDICATOR DOES NOT

LIGHT AT 104% NR (ACV) (IN FLIGHT

AUTOROTATION)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

CPG HIGH RPM ROTOR INDICATOR DOES NOT

LIGHT AT 108% NR (ACW) (IN FLIGHT

AUTOROTATION)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

CPG INTR LT EDGE–LIGHT PANEL DOES NOT

LIGHT (CPG INTR LT PANEL: L CSL, R CSL

AND INST CONTROLS ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

CPG LAT 1 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE
TM 1–1520–238–T–2

2–46 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG LAT 2 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG LAT LVDT NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG LEFT BRAKE IS NOT FIRM OR WHEEL

ASSEMBLY ROTATES (PRESSURE APPLIED)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

CPG LEFT CONSOLE EDGE–LIGHTS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

CPG LEFT SSU NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 9–1270–221–23 IHADSS

CPG LONG 1 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG LONG 2 DCPLR NO–GO CPG

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG LONG LVDT NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

CPG LOW RPM ROTOR INDICATOR DOES NOT

LIGHT AT 93% OR LESS (ENGINES

OPERATING) (PILOT INSTRUMENT PANEL:

NP BETWEEN 80% TO 85%)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

CPG LOW RPM ROTOR INDICATOR IS NOT

LIGHTED (CPG MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CPG MISSILE INDICATOR IS NOT LIGHTED

(CPG FIRE CONTROL PANEL: MSL SWITCH

SET TO ON) (ORT LH GRIP: WAS SET TO

MLS)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CPG MUX NO–GO CHECK CIR BRKR APPEARS

ON HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

CPG NU/ND INOPERATIVE STAB POS

INDICATORS DO NOT MOVE

TM 1–1520–238–T–7 STABILATOR

CPG POWER QUADRANT EDGE–LIGHT PANEL

DOES NOT LIGHT (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)
TM 1–1520–238–T–2

2–47

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG PRI MUX INDICATOR DOES NOT LIGHT

(CPG CIRCUIT BREAKER PANEL NO. 1: FC

FCC CIRCUIT BREAKER OPENED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

CPG RADIO CALL PLACARD EDGE LIGHT

DOES NOT LIGHT (CPG INTR LT PANEL: R

CSL AND L CSL CONTROLS ROTATED TO

BRT)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

CPG RADIO MONITOR PLACARD EDGE LIGHT

DOES NOT LIGHT (CPG INTR LT PANEL: R

CSL AND L CSL CONTROLS ROTATED TO

BRT)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

CPG RECEIVE AUDIO IS NOT PRESENT IN CPG

HEADSET (PILOT CYCLIC STICK: RADIO/ICS

SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG RESET INOPERATIVE STAB POS

INDICATORS NOT 19 ±2° ND

TM 1–1520–238–T–7 STABILATOR

CPG RIGHT BRAKE IS NOT FIRM OR WHEEL

ASSEMBLY ROTATES (PRESSURE APPLIED)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

CPG RIGHT CONSOLE EDGE–LIGHTS DO NOT

LIGHT (CPG INTR LT PANEL: R CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 CPG EDGE–LIGHTS

CPG RIGHT SSU NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 9–1270–221–23 IHADSS

CPG ROCKET INDICATOR FLASHES OR

LIGHTS (CPG CYCLIC STICK: SWITCH SET

TO R ON)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

CPG ROCKET INDICATOR IS NOT LIGHTED

(CPG FIRE CONTROL PANEL: RKT SWITCH

SET TO NORM) (ORT LH GRIP: WAS SET TO

RKT)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

CPG ROCKET INDICATOR LIGHTS (CPG FC

PANEL: RKT SWITCH SET TO NORM)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

CPG SAFE/ARM INDICATOR OR ANY

CAUTION/WARNING INDICATORS DO NOT

LIGHT (PILOT OR CPG MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

2–48

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG SAFE OR ARM INDICATOR LIGHTS (CPG

FCP: CPG SWITCH SET TO ARM THEN

SAFE)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

CPG SDD, DIM/TEST PANEL, TORQUE AND

ENG–RTR RPM% INDICATORS

EDGE–LIGHTING DO NOT LIGHT (CPG INTR

LT PANEL: INST CONTROL ROTATED TO

BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD INDICATORS DO NOT LIGHT WHEN

SELECTED (CPG SDD PANEL: SELECT

SWITCH SET TO RESPECTIVE POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL DOES NOT INDICATE ENGINE

1 OR ENGINE 2 OIL PRESSURE (ENGINE 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL DOES NOT INDICATE ENGINE

1 AND/OR ENGINE 2 NG% RPM (ENGINE 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL DOES NOT INDICATE ENGINE

1 AND/OR ENGINE 2 TGT (ENGINE 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL DIGITAL READOUTS ARE

NOT BLANKED OUT (CPG SDD PANEL:

SELECT SWITCH SET TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL DIGITAL READOUTS DO NOT

BLANK (CPG DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH SET TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL DIGITAL READOUTS DO NOT

INDICATE WITHIN .5% WHEN NG RPM%

INDICATOR LIGHTS (CPG SDD PANEL:

SELECT SWITCH ROTATED TO EACH

POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL EDGE–LIGHTING DOES NOT

LIGHT (CPG INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–49

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG SDD PANEL ENG OIL DIGITAL READOUTS

DO NOT INDICATE 0 TO 5 LBS PRESSURE

WHEN ENG OIL INDICATOR LIGHTS (CPG

SDD: SELECT SWITCH ROTATED TO EACH

POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL FUEL QTY LBX10 DIGITAL

READOUTS DO NOT INDICATE EXISTING

FUEL ±20 LBS WHEN FUEL QUANTITY

INDICATOR LIGHTS (CPG SDD PANEL:

SELECT SWITCH ROTATED TO EACH

POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL LEFT/FWD OR RIGHT/AFT

INDICATORS DO NOT SHOW DIGITAL 888

(CPG DIM/TEST PANEL: DGT OFF/NORM/

TST SWITCH SET TO TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL NG% RPM DIGITAL

READOUTS DO NOT INDICATE WITHIN 5%

WHEN NG RPM% INDICATOR LIGHTS (CPG

SDD PANEL: SELECT SWITCH ROTATED TO

EACH POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SDD PANEL TGT DIGITAL READOUTS DO

NOT INDICATE AMBIENT TEMPERATURE ±5°

WHEN TGT INDICATOR LIGHTS (CPG SDD

PANEL: SELECT SWITCH ROTATED TO

EACH POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG SELECTABLE DIGITAL DISPLAY DIGITAL

READOUTS DO NOT AGREE WITH PILOT

FUEL QUANTITY INDICATOR TOTAL DIGITAL

READOUTS (CPG FUEL PANEL: TRANS

SWITCH SET TO OFF AND ORIDE SWITCH

SET TO PLT)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

CPG SELECTABLE DIGITAL DISPLAY DIGITAL

READOUTS DO NOT AGREE WITH PILOT

FUEL QUANTITY INDICATOR TOTAL DIGITAL

READOUTS (FUEL IN FORWARD AND AFT

FUEL CELLS)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

2–50 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG SELECTABLE DIGITAL DISPLAY DIGITAL

READOUTS DO NOT AGREE WITH PILOT

FUEL QUANTITY INDICATOR VERTICAL

DISPLAYS (CPG FUEL PANEL: TRANS

SWITCH SET TO FWD)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

CPG SELECTABLE DIGITAL DISPLAY EDGE–

LIGHTS ARE NOT LIGHTED

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

CPG SELECTABLE DIGITAL DISPLAY PANEL,

NG, TGT ENG–RTR, TORQUE OR ENG OIL

INDICATORS DO NOT INDICATE (ENGINE 1

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

CPG SELECTABLE DIGITAL DISPLAY PANEL,

NG, TGT, ENG–RTR, TORQUE OR ENG OIL

INDICATORS DO NOT INDICATE (ENGINE 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

CPG STAB DEG/NOM SPD PLACARD PANEL

EDGE–LIGHT DOES NOT LIGHT

TM 1–1520–238–T–7 STABILATOR

CPG STAB POS INDICATOR DOES NOT

INDICATE 25 ±2° ND (PILOT COLLECTIVE

STICK: RESET PUSHBUTTON PRESSED)

TM 1–1520–238–T–7 STABILATOR

CPG STAB POS INDICATOR EDGE–LIGHT

DOES NOT LIGHT

TM 1–1520–238–T–7 STABILATOR

CPG TADS INDICATOR DOES NOT LIGHT AND

THEN GOES OUT AFTER BUILT IN TEST

(CPG FCP: SYSTEM TADS SWITCH SET TO

TADS) (CPG COLLECTIVE STICK: NVS

SWITCH SET TO TADS)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

CPG TADS INDICATOR IS NOT LIGHTED (CPG

FIRE CONTROL PANEL: TADS SWITCH SET

TO TADS)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–51

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG TEMP INT INDICATOR IS LIGHTED BUT

NOT LIGHTED ON PILOT CAUTION/

WARNING PANEL (MASTER CAUTION/

WARNING PANELS: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CPG TEMP TR INDICATOR IS LIGHTED BUT

NOT LIGHTED ON PILOT CAUTION/

WARNING PANEL (MASTER CAUTION/

WARNING PANELS: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

CPG TORQUE INDICATOR DIGITAL READOUTS

ARE NOT BLANKED OUT (CPG SDD PANEL:

SELECT SWITCH ROTATED TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG TORQUE INDICATOR DIGITAL READOUTS

DO NOT BLANK (CPG DIM/ TEST PANEL:

DGT OFF/NORM/TST SWITCH SET TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG TORQUE INDICATOR DOES NOT

INDICATE ENGINE 1 TORQUE (ENGINE 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG TORQUE INDICATOR DOES NOT

INDICATE ENGINE 2 TORQUE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG TORQUE INDICATOR DOES NOT

INDICATE FULL SCALE OR SHOW DIGITAL

888, OR VERTICAL SCALE INDICATORS

HAVE EVERY OTHER LAMP NOT LIGHTED

(CPG DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH SET TO TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG TORQUE INDICATOR EDGE–LIGHTING

DOES NOT LIGHT (CPG INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–52

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG TORQUE INDICATOR VERTICAL SCALE

INDICATORS AND DIGITAL READOUTS DO

NOT INDICATE 0% TO 2% (CPG SDD PANEL:

SELECT SWITCH ROTATED TO EACH

POSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

CPG TRANSMIT AUDIO IS NOT PRESENT IN

EITHER HEADSET (CPG TRANSMITTING)

(CPG CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG UTILITY LIGHT DOES NOT LIGHT

(RHEOSTAT ROTATED TO BRT)

TM 1–1520–238–T–6 CPG UTILITY AND

SECONDARY

LIGHTS

CPG VHF AM–FM RADIO TRANSMIT POWER IS

REPORTED TO BE WEAK OR NOT CLEAR

(PILOT CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG VHF AM–FM RECEIVER/TRANSMITTER

EDGE LIGHT IS NOT LIGHTED (CPG INTR LT

PANEL: R CSL CONTROL ROTATED TO BRT)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG VHF AM–FM RECEIVER/TRANSMITTER

DOES NOT TUNE TO PROPER PRESET

CHANNEL (FREQUENCY SELECT SWITCH

SET TO PRE)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG VHF RECEIVE AUDIO IS NOT PRESENT IN

EITHER HEADSET (PILOT CYCLIC STICK:

RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG VHF RECEIVE AUDIO IS NOT PRESENT IN

PILOT HEADSET (PILOT CYCLIC STICK:

RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

CPG VIDEO AND SYMBOLS ARE NOT

DISPLAYED (ORT: VIDEO SEL SWITCH SET

TO PNVS)

TM 11–1520–238–23–2 SYMBOL

GENERATOR
TM 1–1520–238–T–2

2–53

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CPG VIDEO AND SYMBOLS ARE NOT

DISPLAYED (VDU: MODE SWITCH SET TO

CPG)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

CPG VIDEO APPEARS ON VDU DISPLAY BUT IS

DISTORTED OR WRONG (VDU: MODE

SWITCH SET TO CPG)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

CPG VIDEO CANNOT BE PLAYED BACK (VIDEO

RECORDER PANEL: PLAY SWITCH SET TO

FWD AND MODE SWITCH SET TO PLAY)

TM 11–1520–238–23–2 VIDEO RECORDER

CPG VIDEO DOES NOT APPEAR ON VDU (VDU:

MODE SWITCH SET TO CPG)

TM 11–1520–238–23–2 HARS SELF TEST

CPG VSI DOES NOT ADJUST TO 0 FPM

(SCREW ADJUSTED)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

CPG VSI EDGE–LIGHTING DOES NOT LIGHT

(CPG INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

CPG WINDSHIELD DOES NOT OPERATE AT

HIGH SPEED (PILOT ANTI ICE PANEL:

WSHLD WIPER SWITCH SET TO HIGH)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

CPG WINDSHIELD DOES NOT OPERATE AT

LOW SPEED (CPG AUX/ANTI–ICE PANEL: W

WIPER SWITCH SET TO CPG)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

CPG WINDSHIELD DOES NOT OPERATE AT

LOW SPEED (PILOT ANTI ICE PANEL:

WSHLD WIPER SWITCH SET TO LOW)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

CRKT AND ROCKET STEERING CURSOR DOES

NOT APPEAR ON VDU AND ROCKET

STEERING CURSOR DOES NOT APPEAR ON

HOD (CPG CYCLIC STICK: R/G/M/C SWITCH

SET TO R)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

CRKT AND ROCKET STEERING CURSOR DOES

NOT APPEAR ON VDU (ORT: RKT/GUN/MSL

SWITCH SET TO RKT)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM
TM 1–1520–238–T–2

2–54

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CYCLIC STICK BINDS OR CHATTERING

OCCURS WHEN STICK IS MOVED

FORWARD, AFT, LEFT OR RIGHT

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT REMAIN IN AFT

POSITION (PILOT CYCLIC STICK: FORCE

TRIM SWITCH SET TO FORCE TRIM

RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT REMAIN IN

FORWARD POSITION (PILOT CYCLIC STICK:

FORCE TRIM SWITCH SET TO FORCE TRIM

RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT REMAIN IN LEFT

POSITION (PILOT CYCLIC STICK: FORCE

TRIM SWITCH SET TO FORCE TRIM

RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT REMAIN IN RIGHT

POSITION (PILOT CYCLIC STICK: FORCE

TRIM SWITCH SET TO FORCE TRIM

RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT RETURN TO

CENTER NEUTRAL POSITION (PILOT

CYCLIC STICK: FULL FORWARD FORCE

TRIM ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT RETURN TO

CENTER NEUTRAL POSITION (PILOT

CYCLIC STICK: RIGHT STOP FORCE TRIM

ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT RETURN TO FULL

CENTER POSITION (PILOT CYCLIC STICK:

FULL AFT FORCE TRIM ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT RETURN TO FULL

CENTER POSITION (PILOT CYCLIC STICK:

LEFT STOP FORCE TRIM ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM
TM 1–1520–238–T–2

Change 4 2–55

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

CYCLIC STICK DOES NOT TRAVEL FULL

FORWARD AND AFT TO THE RESPECTIVE

STOP (PILOT CYCLIC STICK: FORCE TRIM

SWITCH SET TO OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

CYCLIC STICK DOES NOT TRAVEL FULL LEFT

AND RIGHT TO RESPECTIVE STOPS (PILOT

CYCLIC STICK: FORCE TRIM SWITCH SET

TO OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

DASE COMPUTER NO–GO AFT AVIONICS BAY

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

DASE ENGAGE PANEL NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

DASE MRTU – LT BUS NO–GO AFT AVIONICS

BAY APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DASE MRTU – RT BUS NO–GO AFT AVIONICS

BAY APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DASE MRTU NO–GO AFT AVIONICS BAY

APPEARS ON HOD (SEC BUS DETACHED)

(ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DASE MRTU NO–GO AFT AVIONICS BAY

APPEARS ON HOD (PRI BUS DETACHED)

(ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DASE MRTU NO–GO AFT AVIONICS BAY

APPEARS ON HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DATA DISPLAYED FOR WAYPOINT 3 (DISPLAY

LINES 1 AND 2 OF FLIGHT PLAN

DICTIONARY PAGE 2) IS NOT THE SAME AS

HOME (CDU: VAB NEXT TO DISPLAYED

NUMBER 3 PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

DATA ENTRY KEYBOARD AND CPG FIRE

CONTROL PANEL NO–GO APPEARS ON

HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DATA ENTRY KEYBOARD EDGE–LIGHTS DO

NOT LIGHT (CPG INTR LT PANEL: L CSL AND

R CSL CONTROLS SET AT DESIRED LEVEL)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM
TM 1–1520–238–T–2

2–56 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

DATA LINE 1 H 12S WN 0000 0000 AND LINE 2

E010.0 CL6 DOES NOT APPEAR ON

SCRATCH PAD DISPLAY LINE (CDU: TOP

RIGHT VAB PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

DATA TRANSFER UNIT NO–GO CPG

COMPARTMENT MESSAGE DISPLAYED

(ADD)

TM 11–1520–238–23–2

TM 1–1520–238–T–3

DATA TRANSFER

UNIT (DTU) (ADD)

DEFOG SHUTOFF VALVE DOES NOT OPERATE

(PILOT ANTI ICE PANEL: CANOPY DEFOG

SWITCH SET TO OFF)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

DEFOG SHUTOFF VALVE DOES NOT OPERATE

(PILOT ANTI ICE PANEL: CANOPY DEFOG

SWITCH SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

DEU NO–GO RH FAB APPEARS ON HOD TM 9–1270–221–23 IHADSS

DIGITAL AND ANALOG READOUTS ON VDU DO

NOT AGREE WITH RHI READINGS (RHI: HI

SET KNOB PRESSED AND HELD TO INITIATE

PUSH–TO–TEST OPERATION)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

DIGITAL READOUTS DO NOT INDICATE 888

(CPG SELECTABLE DIGITAL DISPLAY: TEST

BUTTON PUSHED AND HELD)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

DIR ACTUATOR NO–GO TAIL SECTION

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

DIR NORM, LO NORM AND THEN HI NORM

(EACH WITH SOLID CONSTRAINTS BOX) DO

NOT APPEAR ON HOD (LOBL CONSTRAINTS

BOX CENTER ON HOD WITH MAN TRK

SWITCH AND CPG MSL PANEL: LOAL

SWITCH SET TO DIR, LO, THEN HI)

TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

Change 5 2–56.1/(2–56.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

DIR RIPL DOES NOT APPEAR ON HOD (CPG

MSL PANEL: MODE SWITCH SET TO RIPL

AND AND LOAL SWITCH SET TO DIR) (CPG

FCP: MSL CHAN SEL SWITCH SET TO LWR)

TM 9–1427–475–20 HME SYSTEM

DISPLAY SYMBOLOGY APPEARS ON HOD TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DISPLAY SYMBOLOGY DOES NOT APPEAR

ON HOD (CPG FCP: MUX SWITCH SET TO

PRI) (PRI BUS DETACHED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DISPLAY SYMBOLOGY DOES NOT APPEAR ON

HOD (CPG FCP: MUX SWITCH SET TO PRI)

(SEC BUS DETACHED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

DIST DATA IS NOT 25.0 KM (+0.1 KM OR BRG

DATA IS NOT 350 DEG (CDU: VAB NEXT TO

DISPLAYED WORDS FLY TO PRESSED AND

NUMBER 1 ENTERED ON SCRATCH PAD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

DL56789012 IS NOT DISPLAYED ON LEFT AND

RIGHT DISPLAYS (CPG DPLR NAV PANEL:

DISPLAY SWITCH SET TO DEST/TGT, DEST

DISP THUMBWHEEL SET TO P AND

KEYBOARD KEYS ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

DNS DOES NOT APPEAR ON SCRATCH PAD

(CDU: LETTERS DNS KEYED INTO

KEYBOARD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

DNS NO–GO MESSAGE DISPLAYED ON CDU

AND SIGNAL DATA CONV–COMP NO–GO LH

AFT CATWALK FD/LS MESSAGE

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

DNS SDCC LT BUS NO–GO LH AFT CATWALK

(ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

DNS SDCC RT BUS NO–GO LH AFT CATWALK

(ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

TM 1–1520–238–T–2

Change 5 2–57

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

DPLR NAV PANEL EDGE–LIGHTS DO NOT

LIGHT (CPG INTR LT PANEL: R CSL

CONTROL ROTATED TO BRT)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

DTC BATTERY LOW TM 1–1520–238–T–3 DATA TRANSFER

UNIT (DTU) (ADD)

DTC DOES NOT ZEROIZE TM 1–1520–238–T–3 DATA TRANSFER

UNIT (DTU) (ADD)

DTC READY DOES NOT APPEAR TM 1–1520–238–T–3 DATA TRANSFER

UNIT (DTU) (ADD)

DTU CIRCUIT BREAKER DOES NOT STAY

CLOSED (ADD)

TM 11–1520–238–23–2 DATA TRANSFER

UNIT (DTU) (ADD)

DTU, EGI, AND SDCC FAIL TO ZEROIZE (ADD) TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)

DTU, EGI, AND SDCC UNCOMMANDED

ZEROIZE (ADD)

TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)

DTU INOP MESSAGE DISPLAYED (ADD) TM 11–1520–238–23–2 DATA TRANSFER

UNIT (DTU) (ADD)

DTU LT BUS NO–GO CPG COMPARTMENT

(ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

DTU RT BUS NO–GO CPG COMPARTMENT

(ADD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

DTU (ONLY) FAILS TO ZEROIZE (ADD) TM 11–1520–238–23–2 DATA TRANSFER

UNIT (DTU) (ADD)

DTU (ONLY) UNCOMMANDED ZEROIZE (ADD) TM 11–1520–238–23–2 DATA TRANSFER

UNIT (DTU) (ADD)

DUAL HYDRAULIC PRESSURE INDICATOR

EDGE–LIGHT IS NOT LIGHTED (PILOT EXT

LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM
TM 1–1520–238–T–2

2–58

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ECS AFT FAN CIRCUIT BREAKER (CB75) DOES

NOT STAY CLOSED

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS AFT FAN CIRCUIT BREAKER (CB75) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)

ECS AIRFLOW HAS NO TEMPERATURE

CHANGE (PILOT ECS PANEL: TEMP

CONTROL SET TO COLD OR WARM)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS AIRFLOW IS LOW OR NOT PRESENT

(PILOT ECS PANEL: ENCU SWITCH SET TO

ON)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS AIRFLOW IS NOT REDUCED (ENGINE 1

OPERATING) (PILOT CENTER CIRCUIT

BREAKER PANEL: FUEL BST CIRCUIT

BREAKER OPENED)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

ECS BLADE DE–ICE CIRCUIT BREAKER (CB85)

DOES NOT STAY CLOSED (APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS BLADE DE–ICE CIRCUIT BREAKER (CB85)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

ECS BLADE DE–ICE CONTR CIRCUIT

BREAKER (CB83) DOES NOT STAY CLOSED

(APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS BLADE DE–ICE CONTR CIRCUIT

BREAKER (CB83) DOES NOT STAY CLOSED

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS BLADE DE–ICE CONTR CIRCUIT

BREAKER (CB83) DOES NOT STAY CLOSED

(PILOT ANTI ICE PANEL: ON/OFF/TEST

SWITCH SET TO TEST)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE
TM 1–1520–238–T–2

2–59

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ECS BLADE DE–ICE CONTR CIRCUIT

BREAKER (CB83) DOES NOT STAY CLOSED

(PILOT ELEC PWR PANEL: BATT/EXT PWR

SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

ECS CAB CIRCUIT BREAKER (CB76) DOES

NOT STAY CLOSED (CPG AUX/ANTI–ICE

PANEL: STBY FAN SWITCH SET TO STBY

FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS CAB CIRCUIT BREAKER (CB76) DOES

NOT STAY CLOSED (PILOT ECS PANEL:

STBY FAN SWITCH SET TO STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS CAB CIRCUIT BREAKER (CB76) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ECS CANOPY ANTI–ICE CIRCUIT BREAKER

(CB78) DOES NOT STAY CLOSED (PILOT

ANTI–ICE PANEL: CANOPY HTR SWITCH

SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

ECS CANOPY ANTI–ICE CIRCUIT BREAKER

(CB78) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)

ECS CANOPY ANTI–ICE CONTR CIRCUIT

BREAKER (CB70) DOES NOT STAY CLOSED

(PILOT ANTI–ICE PANEL: CANOPY HTR

SWITCH SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

ECS CANOPY ANTI–ICE CONTR CIRCUIT

BREAKER (CB70) DOES NOT STAY CLOSED

(PILOT ELEC PWR PANEL: BATT/EXT PWR

SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

PILOT STATION)

ECS ENG ANTI–ICE CIRCUIT BREAKER (CB67)

DOES NOT STAY CLOSED (APU OPERATING)

TM 1–1520–238–T–8 ENGINE ANTI–ICE
TM 1–1520–238–T–2

2–60

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ECS ENG ANTI–ICE CIRCUIT BREAKER (CB67)

DOES NOT STAY CLOSED (PILOT ANTI ICE

PANEL: ENG INLET ON/OFF SWITCH SET TO

ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ECS ENG ANTI–ICE CIRCUIT BREAKER (CB67)

DOES NOT STAY CLOSED (PILOT ANTI ICE

PANEL: PITOT ICE DET AD SNSR SWITCH

SET TO ON)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS ENG ANTI–ICE CIRCUIT BREAKER (CB67)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

PILOT STATION)

ECS FAB FANS CIRCUIT BREAKER (CB88)

DOES NOT STAY CLOSED (CPG AUX/

ANTI–ICE PANEL: STBY FAN SWITCH SET TO

STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS FAB FANS CIRCUIT BREAKER (CB88)

DOES NOT STAY CLOSED

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS FAB FANS CIRCUIT BREAKER (CB88)

DOES NOT STAY CLOSED (PILOT ECS

PANEL: STBY FAN SWITCH SET TO STBY

FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS FAB FANS CIRCUIT BREAKER (CB88)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)

ECS ICE DET CIRCUIT BREAKER (CB68) DOES

NOT STAY CLOSED (APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS ICE DET CIRCUIT BREAKER (CB68) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)
TM 1–1520–238–T–2

2–61

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ECS ICE DET HTR CIRCUIT BREAKER (CB212)

DOES NOT STAY CLOSED (PILOT ANTI ICE

PANEL: PITOT ICE DET AD SNSR SWITCH

SET TO ON)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS ICE DET HTR CIRCUIT BREAKER (CB212)

DOES NOT STAY CLOSED (APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ECS ICE DET HTR CIRCUIT BREAKER (CB212)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)

ECS INDICATOR DID NOT LIGHT IN KNOWN

OVERHEAT CONDITION

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS INDICATOR IS LIGHTED (PILOT ECS

PANEL: ENCU SWITCH SET TO ON)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS L NOSE GRBX HTR CIRCUIT BREAKER

(CB38) DOES NOT STAY CLOSED (APU

OPERATING)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ECS L NOSE GRBX HTR CIRCUIT BREAKER

(CB38) DOES NOT STAY CLOSED (PILOT

ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ECS L NOSE GRBX HTR CIRCUIT BREAKER

(CB38) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

ECS PANEL EDGE–LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS R NOSE GRBX HTR CIRCUIT BREAKER

(CB211) DOES NOT STAY CLOSED (APU

OPERATING)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE
TM 1–1520–238–T–2

2–62 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ECS R NOSE GRBX HTR CIRCUIT BREAKER

(CB211) DOES NOT STAY CLOSED (PILOT

ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

ECS R NOSE GRBX HTR CIRCUIT BREAKER

(CB211) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

ECS SHUTOFF VALVE DOES NOT OPERATE

(PILOT ECS PANEL: ENCU SWITCH SET TO

ON)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

ECS WSHLD WPR CIRCUIT BREAKER (CB71)

DOES NOT STAY CLOSED (PILOT ANTI ICE

PANEL: WSHLD WIPER SWITCH SET TO

LOW)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

ECS WSHLD WPR CIRCUIT BREAKER (CB71)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

PILOT STATION)

EGI CANNOT LOAD GUV (ADD) TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)

EGI CIRCUIT BREAKER DOES NOT STAY

CLOSED (ADD)

TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)

EGI LT BUS NO–GO RFAB TAILCONE (ADD) TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

EGI RT BUS NO–GO RFAB TAILCONE (ADD) TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM (ADD)

EGI (ONLY) FAILS TO ZEROIZE (ADD) TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)

EGI (ONLY) UNCOMMANDED ZEROIZE (ADD) TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)
TM 1–1520–238–T–2

Change 5 2–62.1/(2–62.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

EGI UNIT NO–GO RFAB TAILCONE MESSAGE

DISPLAYED (ADD)

TM 11–1520–238–23–2

TM 1–1520–238–T–3

EMBEDDED

GPS–INERTIAL

(ADD)

ELECTRICAL POWER DISTRIBUTION BOX FAN

IS NOT OPERATING

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

EMERG BATT CAUT CIRCUIT BREAKER (CB29)

DOES NOT STAY CLOSED (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

EMERG BATT CAUT CIRCUIT BREAKER (CB29)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

CPG STATION)

EMERG BATT CAUT CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

TM 1–1520–238–T–2

2–63

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

EMERG BATT ENG INST CIRCUIT BREAKER

(CB31) DOES NOT STAY CLOSED

(EXTERNAL POWER APPLIED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

EMERG BATT ENG INST CIRCUIT BREAKER

(CB31) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

EMERG BATT ICS CIRCUIT BREAKER (CB13)

DOES NOT STAY CLOSED

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM

EMERG BATT ICS CIRCUIT BREAKER (CB13)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

EMERG BATT ICS CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

EMERG BATT UTIL SEC LT CIRCUIT BREAKER

(CB30) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

CPG STATION)

EMERG BATT VHF AM/FM CIRCUIT BREAKER

(CB32) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

CPG STATION)

EMERG BATT VHF AM/FM CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

EMERGENCY HYDRAULIC FLIGHT CONTROLS

DO NOT OPERATE PROPERLY (PILOT

CENTER CIRCUIT BREAKER PANEL: EMERG

HYD CIRCUIT BREAKER CLOSED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM
TM 1–1520–238–T–2

2–64

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

EMERGENCY HYDRAULIC FLIGHT CONTROLS

DO NOT OPERATE PROPERLY (PILOT

CENTER CIRCUIT BREAKER PANEL: EMERG

HYD CIRCUIT BREAKER OPEN)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

EMERGENCY HYDRAULIC PRESSURE

INDICATOR DOES NOT INDICATE 3000 PSI

(PILOT INSTRUMENT PANEL: EMERG HYD

SWITCH SET TO EMERG HYD)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

EMERGENCY HYDRAULIC PRESSURE

INDICATOR EDGE–LIGHT IS NOT LIGHTED

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

EMERG HYD CIRCUIT BREAKER (CB35) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

EMERG HYD CIRCUIT BREAKER (CB35) DOES

NOT STAY CLOSED (PILOT INSTRUMENT

PANEL: EMERG HYD SWITCH SET TO

EMERG HYD)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

EMERG HYD SWITCH EDGE–LIGHT IS NOT

LIGHTED (PILOT EXT LT/INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

EMERG PWR INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

EMERG PWR INDICATOR IS NOT LIGHTED

WITH CKT B SWITCH CLOSED (EMERG PWR

CHK OVSP TEST PANEL: CKT B SWITCH SET

TO ENG 1)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

EMERG PWR INDICATOR IS NOT LIGHTED

WITH CKT B SWITCH CLOSED (EMERG PWR

CHK OVSP TEST PANEL: CKT B SWITCH SET

TO ENG 2)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)
TM 1–1520–238–T–2

2–65

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENG 1 ANTI ICE AND ENG 2 ANTI ICE

INDICATORS ARE LIGHTED (PILOT ANTI ICE

PANEL: ENG INLET ON/OFF SWITCH SET TO

OFF)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 ANTI ICE AND ENG 2 ANTI ICE

INDICATORS DO NOT LIGHT (PILOT ANTI

ICE PANEL: ENG INLET ON/OFF SWITCH

SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 ANTI ICE AND ENG 2 ANTI ICE

INDICATORS REMAIN LIGHTED (PILOT

POWER QUADRANT: ENG START NO 1 OR

NO 2 SWITCH SET TO IGN OVRD AND PILOT

ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 ANTI ICE INDICATOR DOES NOT LIGHT

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 ANTI ICE INDICATOR IS LIGHTED

(ENGINE 1 AND 2 OPERATING)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 ANTI ICE INDICATOR IS LIGHTED

(ENGINES 1 AND 2 OPERATING) (PILOT ANTI

ICE PANEL: ENG INLET ON/OFF SWITCH

SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 ANTI ICE INDICATOR IS LIGHTED (PILOT

ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO OFF)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 1 FIRE PULL HANDLES DO NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 1)

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION

ENG 1 FIRE PULL HANDLES DO NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 2)

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION

ENG 1 FIRE PULL INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–66

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENG 1 FIRE PULL INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENG 1 INDICATOR DOES NOT RELIGHT WITH

CKT A AND CKT B SWITCHES RELEASED

(PILOT POWER QUADRANT: ENGINE NO 1

PWR LEVER SET TO FLY AND EMERG PWR

CHK OVSP TEST PANEL: CKT A AND CKT B

SWITCHES RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENG 1 INDICATOR DOES NOT LIGHT (CPG

MASTER CAUTION/WARNING PANEL:

MASTER CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENG 2 ANTI ICE INDICATOR DOES NOT LIGHT

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 2 ANTI ICE INDICATOR IS LIGHTED

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 2 ANTI ICE INDICATOR IS LIGHTED

(ENGINES 1 AND 2 OPERATING) (PILOT ANTI

ICE PANEL: ENG INLET ON/OFF SWITCH

SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 2 ANTI ICE INDICATOR IS LIGHTED (PILOT

ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO OFF)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG 2 FIRE PULL HANDLES DO NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 1)

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION

ENG 2 FIRE PULL HANDLES DO NOT LIGHT

(PILOT APU FIRE TEST PANEL: FIRE TEST

DET SWITCH SET TO 2)

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION

ENG 2 FIRE PULL INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–67

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENG 2 FIRE PULL INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENG 2 INDICATOR DOES NOT LIGHT (CPG

MASTER CAUTION/WARNING PANEL:

MASTER CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–6 POWER PLANTS

(ENGINE 2)

ENG CUT CIRCUIT BREAKER (CB60) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ENG CUT CIRCUIT BREAKER DOES NOT STAY

CLOSED (MASTER CAUTION/ WARNING

PANELS: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ENG ICE INDICATOR DOES NOT LIGHT WHEN

ICING SEVERITY METER INDICATES

GREATER THAN 0.0 G/M3 (PILOT AFT

CIRCUIT BREAKER PANEL: ECS BLADE

DE–ICE CONTR AND ECS BLADE DE–ICE

CIRCUIT BREAKERS CLOSED)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ENG ICE INDICATOR IS LIGHTED (PILOT ANTI

ICE PANEL: ON/OFF/TEST SWITCH SET TO

OFF AND AUTO/TRACE/LT/MOD SWITCH

SET TO AUTO)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ENGINE 1 DOES NOT ACCELERATE (CPG

POWER QUADRANT: ENGINE NO 1 PWR

LEVER SET TO FLY)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 DOES NOT ACCELERATE (PILOT

POWER QUADRANT: ENGINE NO 1 PWR

LEVER SET TO FLY)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)
TM 1–1520–238–T–2

2–68

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 1 DOES NOT ACCELERATE TO OR

REMAINS BETWEEN 23% AND 25% NG (CPG

POWER QUADRANT: ENGINE NO 1 PWR

LEVER SET TO OFF AND ENG START NO 1

SWITCH SET TO IGN OVRD)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 DOES NOT ACCELERATE TO OR

REMAINS BETWEEN 23% AND 25% NG

(PILOT POWER QUADRANT: ENGINE NO 1

PWR LEVER SET TO OFF AND ENG START

NO 1 SWITCH SET TO IGN OVRD)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 DOES NOT RESTART (EMERG PWR

CHK OVSP TEST PANEL: CKT A AND CKT B

SWITCHES RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 DOES NOT START (ENGINE 1

STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO AFT

POSITION (CPG FUEL PANEL: ORIDE

SWITCH SET TO PLT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO AFT

POSITION (CPG FUEL PANEL: TK SEL

SWITCH SET TO FROM AFT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO AFT

POSITION (PILOT FUEL PANEL: ENG 1

SWITCH SET TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO CLOSED

POSITION (CPG INSTRUMENT PANEL: ENG 1

FIRE PULL HANDLE PULLED)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO CLOSED

POSITION (PILOT FUEL PANEL: ENG 1 AND

ENG 2 SWITCHES SET TO OFF)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM
TM 1–1520–238–T–2

2–69

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO CLOSED

POSITION (PILOT FUEL PANEL: ENG 2

SWITCH SET TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO FORWARD

POSITION (CPG FUEL PANEL: TK SEL

SWITCH SET TO FROM FWD)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO FORWARD

POSITION (CPG INSTRUMENT PANEL: ENG 2

FIRE PULL HANDLE PUSHED)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO FORWARD

POSITION (PILOT FUEL PANEL: CROSSFEED

SWITCH SET TO FWD TK)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO NORMAL

POSITION (CPG FUEL PANEL: ORIDE

SWITCH SET TO CPG)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO NORMAL

POSITION (CPG FUEL PANEL: TK SEL

SWITCH SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO NORMAL

POSITION (PILOT FUEL PANEL: CROSSFEED

SWITCH SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 1 NGB FAIRING DOES NOT GET HOT

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENGINE 1 NG DOES NOT DECREASE (EMERG

PWR CHK OVSP TEST PANEL: CKT A AND B

SWITCHES SET TO ENG 1)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)
TM 1–1520–238–T–2

2–70

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 1 NG DOES NOT DECREASE TO AND

STABILIZE AT IDLE (CPG COLLECTIVE

STICK: CHOP COLLAR TURNED FULL

CLOCKWISE AND RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 NG DOES NOT GO TO AND THEN

STABILIZE AT IDLE (PILOT COLLECTIVE

STICK: CHOP COLLAR TURNED FULL

CLOCKWISE AND RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 NG DOES NOT REMAIN STABLE

(EMERG PWR CHK OVSP TEST PANEL: CKT

A SWITCH SET TO ENG 1)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 NG DOES NOT REMAIN STABLE

(EMERG PWR CHK OVSP TEST PANEL: CKT

B SWITCH SET TO ENG 1)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 1 OUT INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

MASTER CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 OUT INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

ENGINE 1 OUT INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: MASTER CAUTION INDICATOR

PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 OUT INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

 TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENGINE 1 OUT INDICATORS ARE NOT

LIGHTED (ENGINE 1 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE 1 STARTS THEN FLAMES OUT, AND

FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR IS AT NORMAL (ENGINE 1

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)
TM 1–1520–238–T–2

2–71

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 1 TORQUE INDICATION IS LOWER

THAN ENGINE 2 TORQUE INDICATION,

INDICATORS ARE NOT WITHIN 5% OF EACH

OTHER (ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 TORQUE SHARING

SYSTEM

ENGINE 1 UPPER AFT FAIRING DOES NOT GET

HOT (PILOT ANTI ICE PANEL: ENG INLET

ON/OFF SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENGINE 2 DOES NOT ACCELERATE (CPG

POWER QUADRANT: ENGINE NO 2 PWR

LEVER SET TO FLY)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 DOES NOT ACCELERATE (PILOT

POWER QUADRANT: ENGINE NO 2 PWR

LEVER SET TO FLY)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 DOES NOT ACCELERATE TO OR

REMAIN BETWEEN 23% AND 25% NG (CPG

POWER QUADRANT: ENGINE NO 2 PWR

LEVER SET TO OFF AND ENG START NO 2

SWITCH SET TO IGN OVRD)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 DOES NOT ACCELERATE TO OR

REMAIN BETWEEN 23% AND 25% NG (PILOT

POWER QUADRANT: ENGINE NO 2 PWR

LEVER SET TO OFF AND ENG START NO 2

SWITCH SET TO IGN OVRD)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 DOES NOT RESTART (PILOT EMERG

PWR CHK OVSP TEST PANEL: CKT A AND

CKT B SWITCHES RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 DOES NOT START (ENGINE 2

STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO AFT

POSITION (CPG FUEL PANEL: ORIDE

SWITCH SET TO PLT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM
TM 1–1520–238–T–2

2–72

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO AFT

POSITION (CPG FUEL PANEL: TK SEL

SWITCH SET TO FROM AFT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO AFT

POSITION (PILOT FUEL PANEL: ENG 2

SWITCH SET TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO CLOSED

POSITION (CPG INSTRUMENT PANEL: ENG 2

FIRE PULL HANDLE PULLED)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO CLOSED

POSITION (PILOT FUEL PANEL: ENG 1 AND

ENG 2 SWITCHES SET TO OFF)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO FORWARD

POSITION (CPG FUEL PANEL: TK SEL

SWITCH SET TO FROM FWD)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO FORWARD

POSITION (CPG INSTRUMENT PANEL: ENG 2

FIRE PULL HANDLE PUSHED)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO FORWARD

POSITION (PILOT FUEL PANEL: CROSSFEED

SWITCH SET TO FWD TK)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO NORMAL

POSITION (CPG FUEL PANEL: ORIDE

SWITCH SET TO CPG)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM
TM 1–1520–238–T–2

2–73

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 2 FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR DOES NOT MOVE TO NORMAL

POSITION (PILOT FUEL PANEL: CROSSFEED

SWITCH SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

ENGINE 2 NGB FAIRING DOES NOT GET HOT

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENGINE 2 NG DOES NOT DECREASE TO AND

STABILIZE AT IDLE (CPG COLLECTIVE

STICK: PUSHED FORWARD AND CHOP

COLLAR TURNED FULLY CLOCKWISE THEN

RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 NG DOES NOT DECREASE TO AND

STABILIZE AT IDLE (PILOT COLLECTIVE

STICK: PUSHED FORWARD AND CHOP

COLLAR TURNED FULLY CLOCKWISE THEN

RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 NG DOES NOT REMAIN STABLE

(EMERG CHK OVSP TEST PANEL: CKT A

SWITCH SET TO ENG 2)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 OUT INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

MASTER CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 OUT INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

ENGINE 2 OUT INDICATORS IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: MASTER CAUTION INDICATOR

PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 OUT INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–74

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENGINE 2 OUT INDICATORS ARE NOT

LIGHTED (ENGINE 2 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 STARTS THEN FLAMES OUT, AND

FUEL CROSSFEED/SHUTOFF VALVE

INDICATOR IS AT NORMAL POSITION

(ENGINE 2 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENGINE 2 TORQUE INDICATION IS LOWER

THAN ENGINE 1 TORQUE INDICATION,

INDICATORS ARE NOT WITHIN 5% OF EACH

OTHER (ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 TORQUE SHARING

SYSTEM

ENGINE 2 UPPER AFT FAIRING DOES NOT GET

HOT (PILOT ANTI ICE PANEL: ENG INLET

ON/OFF SWITCH SET TO ON)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENGINE CHOP INDICATOR DOES NOT LIGHT

(CYCLIC STICK: PUSHED FORWARD AND

CHOP COLLAR TURNED CLOCKWISE AND

RELEASED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE CHOP INDICATOR IS NOT LIGHTED

(CPG CAUTION/WARNING PANEL: PRESS TO

TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENGINE CHOP INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENGINE NOSE GEARBOX OIL LOSS IS

INDICATED

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

ENGINE TORQUE DISPLAY ON PILOT VDU

FLASHES OR IS NOT PRESENT (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ENG INLET ENG 1 INDICATOR IS NOT LIGHTED

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO OFF)

TM 1–1520–238–T–8 ENGINE ANTI–ICE
TM 1–1520–238–T–2

2–75

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENG INLET ENG 1 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENG INLET ENG 1 INDICATOR REMAINS

LIGHTED (ENGINE 1 AT 92% NG RPM)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG INLET ENG 1 AND ENG 2 INDICATORS

ARE NOT LIGHTED (PILOT ANTI ICE PANEL:

ENG INLET ON/OFF SWITCH SET TO OFF)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG INLET ENG 2 INDICATOR IS NOT LIGHTED

(PILOT ANTI ICE PANEL: ENG INLET ON/OFF

SWITCH SET TO OFF)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG INLET ENG 2 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG INLET ENG 2 INDICATOR REMAINS

LIGHTED (ENGINE 2 AT 92% NG RPM)

TM 1–1520–238–T–8 ENGINE ANTI–ICE

ENG INST CIRCUIT BREAKER (CB17) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ENG INST CIRCUIT BREAKER DOES NOT STAY

CLOSED (EXTERNAL ELECTRICAL POWER

APPLIED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

ENG LVR CIRCUIT BREAKER (CB16) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ENG START CIRCUIT BREAKER (CB58) DOES

NOT STAY CLOSED

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

ENG START CIRCUIT BREAKER DOES NOT

STAY CLOSED (ENGINE 1 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)
TM 1–1520–238–T–2

2–76 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ENG START CIRCUIT BREAKER DOES NOT

STAY CLOSED (ENGINE 2 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENG START CIRCUIT BREAKER (CB58) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ENG START ENG 1 INDICATORS IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENG START ENG 2 INDICATORS IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

ENG START NO 1 INDICATOR DOES NOT LIGHT

(ENGINE 1 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENG START NO 1 INDICATOR REMAINS

LIGHTED ABOVE 52% NG (ENGINE 1

STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

ENG START NO 2 INDICATOR DOES NOT LIGHT

(ENGINE 2 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENG START NO 2 INDICATOR REMAINS

LIGHTED ABOVE 52% NG (ENGINE 2

STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

ENG WARN CIRCUIT BREAKER (CB52) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

ENG WARN CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

ENG WARN CIRCUIT BREAKER DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 AUDIO WARNING

SYSTEM
TM 1–1520–238–T–2

2–77

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

EVENT MARK TONE IS NOT HEARD (VIDEO

RECORDER PANEL: MODE SWITCH SET TO

PLAY AND PLAY SWITCH SET TO FWD)

TM 11–1520–238–23–2 VIDEO RECORDER

EXT EMP INDICATOR DOES NOT LIGHT WITH

PILOT FUEL QUANTITY INDICATOR TOTAL

DIGITAL READOUT NOT INCREASING (FUEL

TRANSFERRING FROM EXTERNAL TANKS)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

EXT EMP INDICATOR IS LIGHTED TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

EXT EMP INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: BATT/EXT PWR SWITCH SET

TO BATT)

TM 1–1520–238–T–6 EXTERNAL POWER

AND GROUND

SERVICE UTILITY

RECEPTACLE

EXT EMP INDICATOR IS LIGHTED (PILOT FUEL

PANEL: EXT TK SWITCH SET TO OFF)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

EXT EMP INDICATOR IS NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

EXT STORES CONTROL BOX NO–GO AFT LH

FAB APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

EXT STORES CONTROL BOX NO–GO AFT OF

LH FAB AND ALL PYLN ACTUATOR

CONTROLLER NO–GO’S APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

FC FCC AC CIRCUIT BREAKER (CB16) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)
TM 1–1520–238–T–2

2–78

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FC FCC DC CIRCUIT BREAKER (CB4) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

FC RCDR CIRCUIT BREAKER (CB8) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

CPG STATION)

FC RCDR CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 11–1520–238–23–2 VIDEO RECORDER

FILLER CAP LOCKING TAB DOES NOT LOCK

FILLER CAP

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FIRE APU INDICATOR IS NOT LIGHTED (CPG

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

FIRE APU INDICATOR IS NOT LIGHTED (PILOT

APU FIRE TEST PANEL: FIRE TEST DET

SELECTOR SET TO 1)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

FIRE APU INDICATOR IS NOT LIGHTED (PILOT

APU FIRE TEST PANEL: FIRE TEST DET

SELECTOR SET TO 2)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

FIRE APU INDICATOR IS NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

FIRE BOTTLE THERMAL DISCHARGE

INDICATOR SHOWS SIGNS OF DISCHARGE

TM 1–1520–238–T–8 FIRE

EXTINGUISHERS

FIRE DETR APU CIRCUIT BREAKER (CB11)

DOES NOT STAY CLOSED

TM 1–1520–238–T–8 APU FIRE

DETECTION
TM 1–1520–238–T–2

2–79

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FIRE DETR APU CIRCUIT BREAKER (CB11)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FIRE DETR ENG 1 CIRCUIT BREAKER (CB12)

DOES NOT STAY CLOSED

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION

FIRE DETR ENG 1 CIRCUIT BREAKER (CB12)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FIRE DETR ENG 2 CIRCUIT BREAKER (CB13)

DOES NOT STAY CLOSED

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION

FIRE DETR ENG 2 CIRCUIT BREAKER (CB13)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FIRE EXTGH APU CIRCUIT BREAKER (CB26)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FIRE EXTGH CPG CIRCUIT BREAKER (CB15)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FIRE EXTGH PLT CIRCUIT BREAKER (CB25)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FIXED AIRCRAFT SYMBOL DOES NOT MOVE

UP AND DOWN ON FACE OF GYROSCOPE

(PULL CAGE KNOB ROTATED CLOCKWISE

AND COUTERCLOCKWISE)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS
TM 1–1520–238–T–2

2–80

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FLASHING UPDATE SPHEROID IS NOT

DISPLAYED ON SCRATCH PAD LINE (CDU:

TOP RIGHT VAB PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

FLY TO DOES NOT CHANGE TO FLY TO 19

(CDU: FAB PRESSED, C6 ENTERED ON

SCRATCH PAD AND VAB NEXT FLY TO

DISPLAY PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

FLY TO DOES NOT CHANGE TO UPDATE TO 3

(CDU: TOP RIGHT VAB PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

FORCE TRIM DOES NOT DISENGAGE (PILOT

CYCLIC STICK: FORCE TRIM SWITCH SET

TO OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

FORCE TRIM DOES NOT DISENGAGE (PILOT

CYCLIC STICK: FORCE TRIM SWITCH SET

TO FORCE TRIM RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

FORCE TRIM DOES NOT ENGAGE (PILOT

CYCLIC STICK: FORCE TRIM SWITCH SET

TO ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

FORWARD DOES NOT APPEAR ON HOD (CPG

FIRE CONTROL PANEL: SIGHT SELECT

SWITCH SET TO TADS)

TM 11–1520–238–23–2 VIDEO RECORDER

FORWARD REMAINS ON HOD AFTER VID RCD

SWITCH PRESSED (ORT: VID RCD SWITCH

ACTIONED)

TM 11–1520–238–23–2 VIDEO RECORDER

FUEL APU CIRCUIT BREAKER (CB9) DOES NOT

STAY CLOSED (PILOT APU FIRE TEST

PANEL: START/RUN/OFF SWITCH SET TO

RUN)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

FUEL APU CIRCUIT BREAKER (CB9) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)
TM 1–1520–238–T–2

2–81

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL BOOST SWITCH DOES NOT STAY ON

(PILOT FUEL PANEL: CROSSFEED SWITCH

SET TO AFT TNK AND BOOST SWITCH SET

TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (APU OPERATING)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (CPG FUEL PANEL:

BOOST SWITCH SET TO BOOST)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (CPG FUEL PANEL: CPG

ORIDE SWITCH SET TO CPG)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (PILOT APU FIRE TEST

PANEL: START/RUN/OFF SWITCH SET TO

RUN)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (PILOT FUEL PANEL:

BOOST SWITCH SET TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (PILOT FUEL PANEL:

CROSSFEED SWITCH SET TO AFT TNK AND

BOOST SWITCH SET TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL BST CIRCUIT BREAKER (CB57) DOES

NOT STAY CLOSED (PILOT POWER

QUADRANT: ENGINES NO 1 AND NO 2 PWR

LEVERS MOVED TO LOCKOUT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL BYP ENG 1 INDICATOR IS LIGHTED BUT

FUEL FILTER IS NOT CLOGGED (ENGINE 1

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)
TM 1–1520–238–T–2

2–82

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL BYP ENG 1 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

FUEL BYP ENG 2 INDICATOR IS LIGHTED BUT

FUEL FILTER IS NOT CLOGGED (ENGINE 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

FUEL BYP ENG 2 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

FUEL CONTINUES TO FLOW FROM SUMP

DRAIN (AFT PUSH–TO–DRAIN CONTROL

RELEASED)

TM 1–1520–238–T–7 HELICOPTER FUEL

SYSTEM VISUAL

CHECK

FUEL CONTINUES TO FLOW FROM SUMP

DRAIN (FORWARD PUSH–TO–DRAIN

CONTROL RELEASED)

TM 1–1520–238–T–7 HELICOPTER FUEL

SYSTEM VISUAL

CHECK

FUEL/DEFUEL CONTROLLABLE CHECK VALVE

DOES NOT OPEN (FUEL FILLER CAP

PULLED OUT OF FUEL CELL FILLER NECK)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FUEL DOES NOT FLOW FROM ENGINE 1

NACELLE OVERBOARD DRAIN (CPG FUEL

PANEL: BOOST SWITCH SET TO BOOST)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL DOES NOT FLOW FROM ENGINE 1

NACELLE OVERBOARD DRAIN (PILOT FUEL

PANEL: BOOST SWITCH SET TO OFF)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL DOES NOT FLOW FROM ENGINE 1

NACELLE OVERBOARD DRAIN (PILOT FUEL

PANEL: BOOST SWITCH SET TO ON)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL DOES NOT FLOW FROM ENGINE 2

NACELLE OVERBOARD DRAIN (CPG FUEL

PANEL: BOOST SWITCH SET TO BOOST)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM
TM 1–1520–238–T–2

2–83

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL DOES NOT FLOW FROM SUMP DRAIN

HOSE (AFT PUSH–TO–DRAIN CONTROL

PUSHED)

TM 1–1520–238–T–7 HELICOPER FUEL

SYSTEM VISUAL

CHECK

FUEL DOES NOT FLOW FROM SUMP DRAIN

HOSE (FORWARD PUSH–TO–DRAIN

CONTROL PUSHED)

TM 1–1520–238–T–7 HELICOPER FUEL

SYSTEM VISUAL

CHECK

FUEL FILL CIRCUIT BREAKER (CB32) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FUEL FILL CIRCUIT BREAKER (CB32) DOES

NOT STAY CLOSED (REFUELING PANEL: LVL

CONT VALVE SWITCHES SET TO CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FUEL FILL CIRCUIT BREAKER (CB32) DOES

NOT STAY CLOSED (REFUELING PANEL: LVL

CONT VALVE SWITCHES SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FUEL FILLER CAP DOES NOT FIT INTO FUEL

CELL FILLER PORT

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FUEL FLOW IS NOT PRESENT FROM ENGINE 1

OVERBOARD FUEL DRAIN (PILOT FUEL

PANEL: CROSSFEED SWITCH SET TO AFT

TK AND BOOST SWITCH SET TO ON)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

FUEL FLOW IS NOT PRESENT (PILOT FUEL

PANEL: CROSSFEED SWITCH SET TO AFT

TK AND BOOST SWITCH SET TO ON)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FUEL FLOWS FROM ENGINE 1 NACELLE

OVERBOARD DRAIN (CPG FUEL PANEL: TK

SEL SWITCH SET TO NORM AND BOOST

SWITCH MOVES TO OFF)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM
TM 1–1520–238–T–2

2–84 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL FLOWS FROM ENGINE 1 NACELLE

OVERBOARD DRAIN (PILOT FUEL PANEL:

CROSSFEED SWITCH SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL FLOWS FROM ENGINE 2 NACELLE

OVERBOARD DRAIN (CPG FUEL PANEL: TK

SEL SWITCH SET TO NORM)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL IS CONTAMINATED (AFT FUEL CELL

SAMPLE)

TM 1–1520–238–T–7 HELICOPTER FUEL

SYSTEM VISUAL

CHECK

FUEL IS CONTAMINATED (FORWARD FUEL

CELL SAMPLE)

TM 1–1520–238–T–7 HELICOPTER FUEL

SYSTEM VISUAL

CHECK

FUEL LEAKAGE IS PRESENT (PILOT APU FIRE

TEST PANEL: START/RUN/OFF SWITCH SET

TO RUN)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

FUEL LEAKS ARE PRESENT TM 1–1520–238–T–7 HELICOPTER FUEL

SYSTEM VISUAL

CHECK

FUEL LEAKS FROM FUEL CELL (FUEL

LOADING)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FUEL LOW AFT INDICATORS – ARE NOT

LIGHTED

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL LOW AFT INDICATORS – ARE NOT

LIGHTED WITH PILOT FUEL QUANTITY

INDICATOR AFT VERTICAL DISPLAY

INDICATING BETWEEN 22 AND 26

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL LOW FWD INDICATORS – ARE NOT

LIGHTED WITH PILOT FUEL QUANTITY

INDICATOR FWD VERTICAL DISPLAY

INDICATING BETWEEN 20 AND 16

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL NOZZLE DOES NOT LOCK ONTO

ADAPTER

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FUEL OR OIL LEAKAGE IS PRESENT (APU

OPERATING)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

FUEL PSI ENG 1 INDICATOR IS LIGHTED

(ENGINE 1 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

FUEL PSI ENG 1 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

FUEL PSI ENG 2 INDICATOR IS LIGHTED

(ENGINE 2 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)
TM 1–1520–238–T–2

Change 4 2–85

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL PSI ENG 2 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

FUEL QUANTITY INDICATOR DOES NOT SHOW

TRANSFER (PILOT CENTER CIRCUIT

BREAKER PANEL: FUEL BST CIRCUIT

BREAKER OPEN) (ENGINE 1 SUPPLYING

BLEED AIR FOR PAS)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

FUEL QTY INDICATION DOES NOT INDICATE F

(FUEL LEVEL IN FILLER NECK BEGINNING

FUEL LOADING)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FUEL QTY INDICATOR DOES NOT INDICATE

FUEL CELL BEING DEFUELED AT

BEGINNING PRESSURE REFUELING

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FUEL SYSTEM AIR PRESSURE IS NOT HEARD

VENTING OVERBOARD (REFUELING PANEL:

REFUEL VALVE SWITCH SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FUEL TRANS CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANS CIRCUIT BREAKER (CB56) DOES

NOT STAY CLOSED (CPG FUEL PANEL:

ORIDE SWITCH SET TO CPG AND TRANS

SWITCH SET TO FWD)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANS CIRCUIT BREAKER (CB56) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/ EXT PWR SWITCH SET TO

EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

FUEL TRANS CIRCUIT BREAKER (CB56) DOES

NOT STAY CLOSED (PILOT FUEL PANEL:

EXT TK SWITCH SET TO ON)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

FUEL TRANS CIRCUIT BREAKER (CB56) DOES

NOT STAY CLOSED (PILOT FUEL PANEL:

TRANS SWITCH SET TO AFT)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

2–86 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL TRANS CIRCUIT BREAKER DOES NOT

STAY CLOSED WITH CPG TRANS SWITCH

SET TO AFT

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANS CIRCUIT BREAKER DOES NOT

STAY CLOSED WITH CPG TRANS SWITCH

SET TO FWD

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANS CIRCUIT BREAKER DOES NOT

STAY CLOSED WITH PILOT TRANS SWITCH

SET AT TO FWD

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANSFER PUMP IS NOT OPERATING

WITH CPG FUEL TRANS SWITCH SET AT TO

AFT

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANSFER PUMP IS NOT OPERATING

WITH CPG FUEL TRANS SWITCH SET AT TO

FWD

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL TRANSFER PUMP IS NOT OPERATING

WITH PILOT FUEL TRANS SWITCH SET AT

TO AFT

TM 1–1520–238–T–7 ENGINE

INSTRUMENTS

FUEL TRANSFER PUMP IS NOT OPERATING

WITH PILOT FUEL TRANS SWITCH SET AT

TO FWD

TM 1–1520–238–T–7 ENGINE

INSTRUMENTS

FUEL VLV ACTR CIRCUIT BREAKER (CB14)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

FUEL XFEED CIRCUIT BREAKER DOES NOT

STAY CLOSED (ADA)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL XFEED CIRCUIT BREAKER (CB55) DOES

NOT STAY CLOSED (CPG FUEL PANEL:

ORIDE SWITCH SET TO CPG)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL XFEED CIRCUIT BREAKER DOES NOT

STAY CLOSED WITH ENGINE 1 AND ENGINE

2 CROSSFEED VALVES AT AFT (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUEL XFEED CIRCUIT BREAKER DOES NOT

STAY CLOSED WITH ENGINE 1 AND ENGINE

2 CROSSFEED VALVES AT FORWARD (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

Change 4 2–86.1/(2–86.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FUEL XFEED CIRCUIT BREAKER DOES NOT

STAY CLOSED WITH ENGINE 1 AND ENGINE

2 CROSSFEED VALVES AT NORMAL (ADB)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL XFEED CIRCUIT BREAKER (CB55) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/ EXT PWR SWITCH SET TO

EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)]

FUEL XFEED CIRCUIT BREAKER (CB55) DOES

NOT STAY CLOSED (PILOT POWER

QUADRANT: ENGINES NO 1 AND NO 2 PWR

LEVERS MOVED TO LOCKOUT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

FUEL XFR/XFER ADVISORY LIGHTS ARE

LIGHTED WITH PILOT AND CPG TRANS

SWITCHES SET TO OFF

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

FUSELAGE FORMATION LIGHT DOES NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: FORM

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 FORMATION LIGHTS

FWD CLOSED INDICATOR IS LIGHTED

(REFUELING PANEL: LVL CONT VALVES

FWD TNK SWITCH SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FWD CLOSED INDICATOR IS NOT LIGHTED

(REFUELING PANEL: LVL CONT VALVES

FWD TNK SWITCH SET TO CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FWD FUEL QTY INDICATOR DOES NOT

INDICATE E (FUEL TRUCK UNABLE TO

DEFUEL FORWARD FUEL CELL)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FWD FUEL QTY INDICATOR DOES NOT

INDICATE E (REFUELING PANEL: FUEL QTY

SWITCH SET TO OFF)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

TM 1–1520–238–T–2

2–87

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

FWD FUEL QTY INDICATOR DOES NOT

INDICATE E (REFUELING PANEL: FUEL QTY

SWITCH SET TO OFF)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FWD FUEL QTY INDICATOR DOES NOT

INDICATE FORWARD FUEL LOAD

(REFUELING PANEL: FUEL QTY SWITCH SET

TO IND ON)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

FWD FUEL QTY INDICATOR DOES NOT

INDICATE FORWARD FUEL LOAD

(REFUELING PANEL: FUEL QTY SWITCH SET

TO IND ON)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FWD FUEL QTY INDICATOR DOES NOT

INDICATE SAME FUEL LOAD AS PILOT FUEL

QUANTITY INDICATOR FWD VERTICAL

DISPLAY (REFUELING PANEL: REFUEL

VALVE SWITCH SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

FWD FUEL QTY INDICATOR DOES NOT SHOW

INCREASE DURING PRESSURE REFUELING

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

 FWD VERTICAL SCALE ON PILOT FUEL

QUANTITY INDICATOR DOES NOT SHOW

INCREASE (PILOT FUEL PANEL: EXT TK

SWITCH SET TO ON)

TM 1–1520–238–T–7 AUXILIARY FUEL

SYSTEM

GEN 1 INDICATOR IS LIGHTED (APU

OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

GEN 1 INDICATOR IS LIGHTED (EXTERNAL

ELECTRICAL POWER REMOVED) (PILOT

ELEC PWR PANEL: GEN 1 SWITCH SET TO

GEN 1)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GEN 1 INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: GEN 1 SWITCH SET TO TEST)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GEN 1 INDICATOR IS NOT LIGHTED (APU

OPERATING) (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR

AND GEN 1 SWITCH SET TO OFF/RESET)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION
TM 1–1520–238–T–2

2–88 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

GEN 1 INDICATOR IS NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

GEN 2 INDICATOR IS LIGHTED (APU

OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

GEN 2 INDICATOR IS LIGHTED (MASTER

CAUTION/WARNING PANELS: PRESS TO

TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

GEN 2 INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: GEN 2 SWITCH SET TO TEST)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GEN 2 INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: GEN 2 SWITCH SET TO GEN 2)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GEN 2 INDICATOR IS NOT LIGHTED (APU

OPERATING) (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR

AND GEN 2 SWITCH SET TO OFF/RESET)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GENERATOR 1 CONTROL NO–GO PLT ELEC

PWR CNTR APPEARS ON HOD

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GENERATOR 1 NO–GO LH XMSN BAY

APPEARS ON HOD

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GENERATOR 2 CONTROL NO–GO PLT ELEC

PWR CNTR APPEARS ON HOD

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GENERATOR 2 NO–GO RH XMSN BAY

APPEARS ON HOD

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

GHOST MISSILES APPEAR ON LAUNCHER

(PILOT FCP: MASTER SWITCH SET TO ARM)

(CPG FCP: CPG SWITCH SET TO ARM)

TM 9–1427–475–20 HME SYSTEM

GPS NO–GO MESSAGE DISPLAYED OR FOM IS

9 AND SV IS 0 (ADD)

TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)
TM 1–1520–238–T–2

2–89

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

GRAYSCALE TEST PATTERN BRIGHTNESS

AND CONTRAST CANNOT BE ADJUSTED

(ORT: DSPL BRT AND DSPL CONT CONTROL

KNOBS ADJUSTED)

TM 9–1270–221–23 IHADSS

GRAYSCALE TEST PATTERN BRIGHTNESS

AND CONTRAST CANNOT BE ADJUSTED

(PILOT FCP: IHADSS VID SYM BRT AND

CONTRAST CONTROL KNOBS ADJUSTED)

TM 9–1270–221–23 IHADSS

GRAYSCALE TEST PATTERN DOES NOT

APPEAR ON CPG HDU (ORT: GS SWITCH

PRESSED)

TM 9–1270–221–23 IHADSS

GRAYSCALE TEST PATTERN DOES NOT

APPEAR ON PILOT HDU (PILOT FCP: VID

SEL SWITCH SET TO GRAYSCALE)

TM 9–1270–221–23 IHADSS

GRAYSCALE TEST PATTERN IMAGE IS

OBSTRUCTED OR APPEARS DEGRADED ON

PILOT OR CPG HDU (ORT: GS SWITCH

PRESSED)

TM 9–1270–221–23 IHADSS

GRAYSCALE TEST PATTERN REMAINS ON

HDU (ORT: VID SEL SWITCH SET TO TADS)

(PILOT FCP: VID SEL SWITCH SET TO PLT)

TM 9–1270–221–23 IHADSS

GREEN ACCEPT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT LIGHT

FOR EACH MODE (PILOT IFF

TRANSPONDER CONTROL PANEL: ANT

SWITCH SET TO DIV) (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

GREEN ACCEPT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT LIGHT

FOR EACH MODE (PILOT IFF

TRANSPONDER CONTROL PANEL:

IDENT/OUT/MIC SWITCH SET TO OUT)

(AN/APM–424 TRANSPONDER TEST SET:

TEST SEQ SWITCH PRESSED AND

RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

2–90

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

GREEN ACCEPT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT LIGHT

FOR EACH MODE (PILOT IFF

TRANSPONDER CONTROL PANEL: MODE 4

SWITCH SET TO ON) (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

GREEN ACCEPT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT LIGHT

(TEST SEQ SWITCH PRESSED AND

RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

GROUND JACK IS DAMAGED AND WILL NOT

ACCEPT GROUND PLUG

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

GROUND JACK IS DAMAGED AND WILL NOT

ACCEPT GROUND PLUG

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

GS DATA IS NOT 150 KPH (CDU: KEYBOARD

150 ENTERED ON SCRATCH PAD AND VAB

NEXT TO DISPLAYED WORD KPH PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

GUN CONTROL BOX NO–GO RH FAB APPEARS

ON HOD

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

GUN FAIL APPEARS ON HOD (CPG CYCLIC

STICK: R/G/M/C SWITCH SET TO G)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

GUN FAIL APPEARS ON HOD (CPG CYCLIC

STICK: TRIGGER PULLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

GUN TURRET DOES NOT UNSTOW (CPG

CYCLIC STICK: R/G/M/C SWITCH SET TO G)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

GUN TURRET LIMITS MESSAGE DOES NOT

NOT APPEAR ON HOD WHEN GUN TURRET

REACHES ITS LIMITS

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

GUN TURRET UNSTOWS TO OTHER THAN

FIXED FORWARD (CPG CYCLIC STICK:

R/G/M/C SWITCH SET TO G)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM
TM 1–1520–238–T–2

Change 6 2–91

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

HANG START OCCURS AND TGT INCREASES

BUT NG DOES NOT REACH IDLE SPEED

(ENGINE 1 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

HANG START OCCURS AND TGT INCREASES

BUT NG DOES NOT REACH IDLE SPEED

(ENGINE 2 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

HARSATT? MESSAGE DISPLAYED (ADD) TM 11–1520–238–23–2 HARS (ADD)

HARSHDG? MESSAGE DISPLAYED (ADD) TM 11–1520–238–23–2 HARS (ADD)

HARSLAT? MESSAGE DISPLAYED (ADD) TM 11–1520–238–23–2 HARS (ADD)

HARSVEL? MESSAGE DISPLAYED (ADD) TM 11–1520–238–23–2 HARS (ADD)

HARS CAL MESSAGE DISPLAYED (ADD) TM 11–1520–238–23–2 HARS (ADD)

HARS CONTROL PANEL EDGE–LIGHTS DO

NOT LIGHT (PILOT EXT LT/INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 11–1520–238–23–2 HARS

HBCM NO–GO – BIAS EXCEEDS 0.3 KTS –

MESSAGE DISPLAYED (AN/ASN–137)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADC)

HARS GO APPEARS ON HOD TM 11–1520–238–23–2 HARS

HARS GO DOES NOT APPEAR ON HOD (HARS

PANEL: ALIGN SWITCH SET TO OPR)

TM 11–1520–238–23–2 HARS

HEADING TAPE DOES NOT APPEAR ON VDU

DISPLAY (VDU: MODE SWITCH SET TO CPG)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

HIGH RPM ROTOR INDICATOR IS NOT

LIGHTED (CPG MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

HIGH RPM ROTOR INDICATOR IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

HIGH RPM ROTOR INDICATORS ARE LIGHTED

(MASTER CAUTION/WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS
TM 1–1520–238–T–2

2–92 Change 6

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

HISSING SOUND (STATIC) IS NOT HEARD

(UHF–AM RECEIVER/TRANSMITTER: MODE

SELECT SWITCH SET TO MAIN AND

SQUELCH SWITCH SET TO OFF)

TM 11–1520–238–23–2 UHF–AM RADIO SET

HOD DISPLAYS A 140° C OR MORE READING

FOR NGB 1 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 140° C OR MORE READING

FOR XMN 1 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 140° C OR MORE READING

FOR NGB 2 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 140° C OR MORE READING

FOR XMN 2 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 28 LB OR LESS READING

FOR NGB 1 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 28 LB OR LESS READING

FOR XMN 1 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 28 LB OR LESS READING

FOR NGB 2 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A 28 LB OR LESS READING

FOR XMN 2 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING BETWEEN 96° C

AND 139° C FOR XMN 1 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING BETWEEN 96° C

AND 139° C XMN 2 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING BETWEEN 121° C

AND 139° C FOR NGB 1 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING BETWEEN 121° C

AND 139° C FOR NGB 2 OIL TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING FROM 29 LB

THROUGH 49 LB FOR XMN 1 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING FROM 29 LB

THROUGH 49 LB FOR XMN 2 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING FROM 29 LB

THROUGH 54 LB FOR NGB 1 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC
TM 1–1520–238–T–2

2–93

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

HOD DISPLAYS A READING FROM 29 LB

THROUGH 54 LB FOR NGB 2 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING FROM 50 LB TO 85

LB FOR XMN 1 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS A READING FROM 50 LB TO 85

LB FOR XMN 2 OIL PRESSURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS NGB 1 HIGH OIL

TEMPERATURE

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOD DISPLAYS NGB 1 LOW OIL PRESSURE TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

HOLD–OPEN DETENT DOES NOT HOLD

CHECK VALVE CONTROL CABLE

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

HORIZON LINE ON VDU DISPLAY DOES NOT

MOVE UP OR DOWN (VDU: PITCH TRIM

CONTROL ADJUSTED)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

HOT BAT INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: BATT/EXT PWR SWITCH SET

TO BATT)

TM 11–1520–238–23–2 BATTERY CHARGER

HOT BAT OR CHARGER INDICATORS ARE

LIGHTED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO BATT)

TM 1–1520–238–T–6 BATTERY

HOT BAT OR CHARGER INDICATORS ARE NOT

LIGHTED (PILOT MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 11–1520–238–23–2 BATTERY CHARGER

HOT RECT 1 INDICATOR IS LIGHTED (APU

OPERATING) (PILOT ELEC PWR PANEL: GEN

1 SWITCH SET TO GEN 1)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

HOT RECT 2 INDICATOR IS LIGHTED (APU

OPERATING) (PILOT ELEC PWR PANEL: GEN

2 SWITCH SET TO GEN 2)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION
TM 1–1520–238–T–2

2–94 Change 1

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

 HSI BEARING DOES NOT CHANGE (ADF RCVR

CONTROL PANEL: CW/VOICE/TEST SWITCH

SET TO TEST)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

HSI BEARING POINTER IS NOT STABLE (RAI:

PITCH TRIM CONTROL ADJUSTED)

TM 11–1520–238–23–2 HARS

HSI BEARING POINTER NO. 1 IS NOT AT 3

O’CLOCK POSITION (HARS PANEL: ALIGN

SWITCH SET TO OPR)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HSI BEARING POINTER NO. 2 AND RMI

BEARING POINTER DO NOT PARK (ADF

CONTROL PANEL: ADF TUNED TO UNUSED

FREQUENCY)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

HSI BEARING POINTER NO. 2 AND RMI

BEARING POINTER DO NOT ROTATE 90

DEGREES FROM PREVIOUS BEARING (ADF

CONTROL PANEL: TEST/TONE SWITCH SET

TO TEST)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

HSI BEARING POINTER NO. 2 AND RMI

BEARING POINTER DO NOT ROTATE (ADF

CONTROL PANEL: TEST/TONE SWITCH SET

TO TEST)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

HSI BEARING POINTER NO. 2 AND RMI

BEARING POINTER ROTATE, BUT

INACCURATE (ADF CONTROL PANEL: MODE

CONTROL SET TO ADF)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–149

HSI BEARING POINTER NO. 2 DOES NOT

MOVE (ADF RCVR CONTROL PANEL: LOOP

CONTROL ADJUSTED)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89

HSI BEARING POINTER NO. 2 DOES NOT

MOVE, AUDIO VOLUME DOES NOT

INCREASE AND DECREASE, OR TUNE

METER NEEDLE DOES NOT MOVE UP AND

DOWN (ADF RCVR CONTROL PANEL: MODE

SWITCH SET TO LOOP AND LOOP

CONTROL ADJUSTED)

TM 11–1520–238–23–2 AUTOMATIC

DIRECTION FINDER

(ADF) AN/ARN–89
TM 1–1520–238–T–2

Change 5 2–94.1/(2–94.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

HSI COMPASS CARD DOES NOT DISPLAY

CORRECT HEADING

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HSI COMPASS CARD DOES NOT INDICATE

CHANGES

TM 11–1520–238–23–2 HARS

HSI COURSE BAR DOES NOT CHANGE (ADD) TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

HSI COURSE SET POINTER AND COURSE SET

DISPLAY DO NOT VARY SMOOTHLY AND

READ THE SAME AT ALL POINTS (HSI: CRS

SET CONTROL ADJUSTED)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HSI DOES NOT CENTER ON COURSE AND

DOPPLER MEM IS NOT DISPLAYED

(AN/ASN–137) (ADD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

HSI EDGE LIGHT DOES NOT LIGHT (PILOT EXT

LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HSI HDG FLAG DOES NOT GO OUT OF VIEW

WITHIN 13 MINUTES (HARS PANEL: ALIGN

SWITCH SET TO NORM)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

HSI HDG FLAG, RAI OFF FLAG AND RMI OFF

FLAGS ARE IN VIEW OR HARS GO

INDICATION IS NOT DISPLAYED

TM 11–1520–238–23–2 HARS

HSI HDG WARNING FLAG IS VISIBLE (ADC)

AND HARS NO–GO (ADD)

TM 11–1520–238–23–2 HARS

TM 1–1520–238–T–2

Change 4 2–95

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

HSI HDG SET MARKER DOES NOT MOVE

SMOOTHLY (HDG SET CONTROL KNOB

ADJUSTED)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HSI HDG WARNING FLAG IS VISABLE TM 11–1520–238–23–2 HARS

HSI HDG WARNING FLAG REMAINS IN VIEW

(HARS PANEL: ALIGN SWITCH SET TO

ALIGN THEN FAST)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HSI OFF (POWER WARNING) FLAG DOES NOT

INDICATE OFF AND THEN RETURN TO

UNMARKED POSITION (PILOT FORWARD

CIRCUIT BREAKER PANEL: NAV HSI CIRCUIT

BREAKER OPENED AND CLOSED)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

HYDRAULIC HAND PUMP DOES NOT SERVICE

PRIMARY HYDRAULIC MANIFOLD

RESERVOIR

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

HYDRAULIC HAND PUMP DOES NOT SERVICE

UTILITY HYDRAULIC MANIFOLD RESERVOIR

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

ICE DETECTOR CONTROLLER NO–GO

FIREWALL LH SIDE APPEARS ON HOD (APU

OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ICE DETECTOR SENSOR AIRFLOW DOES NOT

STOP (PILOT ANTI ICE PANEL: PITOT ICE

DET AD SNSR SWITCH SET TO OFF)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ICE DETECTOR SENSOR HAS NO AIRFLOW

(PILOT ANTI ICE PANEL: PITOT ICE DET AD

SNSR SWITCH SET TO ON)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ICE DETECTOR SENSOR NO–GO ENG INLET

LH SIDE APPEARS ON HOD (ACY) (APU

OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ICE DETECTOR SENSOR NO–GO DOGHOUSE

FAIRING APPEARS ON HOD (ACZ) (APU

OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

ICING SEVERITY METER DOES NOT INDICATE

1.5 G/M3 (PILOT INSTRUMENT PANEL: ICING

SEVERITY METER: PRESS TO TEST SWITCH

PRESSED)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE
TM 1–1520–238–T–2

2–96

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ICING SEVERITY METER DOES NOT INDICATE

GREATER THAN 0.0 G/M3 WHEN ENG ICE

INDICATOR IS LIGHTED (PILOT AFT CIRCUIT

BREAKER PANEL: ECS BLADE DE–ICE

CONTR AND ECS BLADE DE–ICE CIRCUIT

BREAKERS CLOSED)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

IFF ANTENNA DAMAGE IS FOUND TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS AND MODE 4 REPLY

INDICATOR DO NOT LIGHT (MODE 4 AUDIO

SWITCH SET TO LIGHT)

TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS AND MODE 4 REPLY

INDICATOR DO NOT LIGHT (MODE 4 AUDIO

SWITCH SET TO LIGHT) (KIR–1A/TSEC

COMPUTER CODE CHANGED)

TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS DO NOT LIGHT (PILOT

CENTER CIRCUIT BREAKER PANEL: COMM

IFF CIRCUIT BREAKER OPENED)

TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS DO NOT LIGHT (PILOT IFF

TRANSPONDER CONTROL PANEL: MODE 4

SWITCH SET TO AUDIO)

TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS DO NOT LIGHT (PILOT IFF

TRANSPONDER CONTROL PANEL: MODE 4

CODE SWITCH SET TO ZERO, MODE 4 TEST

SWITCH SET TO ON AND MODE 4 AUDIO

SWITCH SET TO OUT, THEN MODE 4 CODE

SWITCH SET TO A)

TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS DO NOT LIGHT (PILOT OR

CPG MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 11–1520–238–23–2 IFF SYSTEM

IFF INDICATORS LIGHT (KIT–1A/TSEC

COMPUTER: CODE INSERTED BY

KIK–18/TSEC) (KIR–1A/TSEC COMPUTER

CONNECTED TO AN/APM–378 TEST SET)

TM 11–1520–238–23–2 IFF SYSTEM

IFF TRANSPONDER DAMAGE FOUND TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

Change 7 2–97

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

IHADSLOS INVALID APPEARS ON CPG HDU

(CPG FCP: BRSIT IHADSS SWITCH SET TO

IHADSS)

TM 9–1270–221–23 IHADSS

IHADSLOS INVALID DOES NOT APPEAR ON

CPG HDU (CPG HELMET RH OR LH IR

SENSORS COVERED)

TM 9–1270–221–23 IHADSS

IHADSLOS INVALID DOES NOT APPEAR ON

PILOT HDU (PILOT HELMET RH OR LH IR

SENSORS COVERED)

TM 9–1270–221–23 IHADSS

IHADSS CIRCUIT BREAKER (CB1) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

IHADSS CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 9–1270–221–23 IHADSS

INS ATT? MESSAGE DISPLAYED TM 1–1520–238–T–3

TM 11–1520–238–23–2

EMBEDDED

GPS–INERTIAL

(ADD)

INS HDG? MESSAGE DISPLAYED TM 1–1520–238–T–3

TM 11–1520–238–23–2

EMBEDDED

GPS–INERTIALB

(ADD)

INS NO–GO MESSAGE DISPLAYED TM 1–1520–238–T–3

TM 11–1520–238–23–2

EMBEDDED

GPS–INERTIAL

(ADD)

INS VEL? MESSAGE DISPLAYED TM 1–1520–238–T–3

TM 11–1520–238–23–2

EMBEDDED

GPS–INERTIAL

(ADD)

INSUFF KEYS APPEARS ON GPS STATUS

PAGE (ADD)

TM 11–1520–238–23–2 EMBEDDED

GPS–INERTIAL

(ADD)

INTERCOM SYSTEM (DSCRM ON MODE) TONE

– IS NOT HEARD IN HEADSET (ADN)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

INTERNAL VIBRATOR IN CPG BAROMETRIC

ALTIMETER IS NOT HEARD (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

INTERNAL VIBRATOR IN PILOT BAROMETRIC

ALTIMETER IS NOT HEARD (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

INVALID CONFIGURATION MESSAGE

DISPLAYED

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)
TM 1–1520–238–T–2

2–98 Change 7

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

IRCM CONTROL UNIT EDGE LIGHT DOES NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: R/CTR

CSL CONTROL ROTATED TO BRT)

TM 11–1520–238–23–2 IR JAMMER SYSTEM

AN/ALQ–144

IR JAM CAUTION INDICATOR DOES NOT LIGHT

(IRCM CONTROL UNIT: ON/OFF SWITCH SET

TO ON)

TM 11–1520–238–23–2 IR JAMMER SYSTEM

AN/ALQ–144

IR JAM CAUTION INDICATOR REMAINS

LIGHTED AFTER 45–75 SECONDS

TM 11–1520–238–23–2 IR JAMMER SYSTEM

AN/ALQ–144

IR JAM POWER CIRCUIT BREAKER (CB63)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – PILOT

STATION)

IR JAMMER XMTR CIRCUIT BREAKER (CB66)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

JETT CIRCUIT BREAKER (CB34) DOES NOT

STAY CLOSED

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

JETT CIRCUIT BREAKER (CB34) DOES NOT

STAY CLOSED (CPG COLLECTIVE STICK: ST

JTSN SWITCH PRESSED AND RELEASED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

JETT CIRCUIT BREAKER (CB34) DOES NOT

STAY CLOSED (PILOT COLLECTIVE STICK:

ST JTSN SWITCH PRESSED AND

RELEASED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

JETT CIRCUIT BREAKER (CB34) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION (DC

EMERGENCY BUS –

PILOT STATION)

KIT STATUS INDICATOR LIGHTS (PILOT IFF

COMPUTER TEST SET: MODE 4 CODE

SWITCH SET TO B)

TM 11–1520–238–23–2 IFF SYSTEM

KIT STATUS INDICATOR LIGHTS (PILOT IFF

COMPUTER TEST SET: MODE 4 CODE

SWITCH SET TO LIGHT)

TM 11–1520–238–23–2 IFF SYSTEM

KIT STATUS INDICATOR LIGHTS (PILOT IFF

COMPUTER TEST SET: MODE 4 CODE

SWITCH SET TO ON)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

2–99

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

KIT STATUS INDICATOR ON IFF

TRANSPONDER LIGHTS (PILOT IFF

COMPUTER TEST SET: MODE 4 CODE

SWITCH SET TO B) (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

KIT STATUS INDICATOR ON IFF

TRANSPONDER LIGHTS (PILOT IFF

COMPUTER TEST SET: MODE 4 CODE

SWITCH SET TO LIGHT) (KIR–1A/TSEC

COMPUTER CODE CHANGED)

TM 11–1520–238–23–2 IFF SYSTEM

KIT STATUS INDICATOR ON IFF

TRANSPONDER LIGHTS (PILOT IFF

COMPUTER TEST SET: MODE 4 CODE

SWITCH SET TO ON) (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

LANDING/SEARCH LIGHT DOES NOT EXTEND

(CPG COLLECTIVE STICK: EXT/RET/L/R

SWITCH SET TO EXT)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT EXTEND

(PILOT COLLECTIVE STICK: EXT/RET/L/R

SWITCH SET TO EXT)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT LIGHT

(CPG COLLECTIVE STICK: SRCH LT SWITCH

SET TO ON)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT LIGHT

(PILOT COLLECTIVE STICK: SRCH LT

SWITCH SET TO ON)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT RETRACT

(CPG COLLECTIVE STICK: EXT/RET/L/R

SWITCH SET TO RET)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT RETRACT

(PILOT COLLECTIVE STICK: EXT/RET/L/R

SWITCH SET TO RET)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT
TM 1–1520–238–T–2

2–100 Change 7

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LANDING/SEARCH LIGHT DOES NOT ROTATE

LEFT (CPG COLLECTIVE STICK:

EXT/RET/L/R SWITCH SET TO L)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT ROTATE

LEFT (PILOT COLLECTIVE STICK:

EXT/RET/L/R SWITCH SET TO L)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT ROTATE

RIGHT (CPG COLLECTIVE STICK:

EXT/RET/L/R SWITCH SET TO R)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT ROTATE

RIGHT (PILOT COLLECTIVE STICK:

EXT/RET/L/R SWITCH SET TO R)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT STOW

(CPG COLLECTIVE STICK: SRCH LT SWITCH

SET TO STOW THEN OFF)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LANDING/SEARCH LIGHT DOES NOT STOW

(PILOT COLLECTIVE STICK: SRCH LT

SWITCH SET TO STOW THEN OFF)

TM 1–1520–238–T–6 LANDING/SEARCH

LIGHT

LASE 1 AND TARGET MESSAGE (FIRST

MISSILE) DO NOT ALTERNATELY FLASH ON

HOD AND ARE NOT REPLACED BY TOF

COUNTDOWN FOR SECOND MISSILE (CPG

CYCLIC STICK: TRIGGER PULLED)

TM 9–1427–475–20 HME SYSTEM

LASE 2 AND TARGET MESSAGES DO NOT

ALTERNATELY FLASH ON HOD (CPG CYCLIC

STICK: TRIGGER NOT PULLED TO SECOND

DETENT)

TM 9–1427–475–20 HME SYSTEM

LASER CIRCUIT BREAKER (CB4) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

LASER DETECTING SET – FAILS SELF–TEST

FOR ALL SENSOR UNITS

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)
TM 1–1520–238–T–2

Change 7 2–100.1/(2–100.2 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LASER DETECTING SET – FAILS SELF-TEST

FOR ONE OR BOTH LEFT SIDE SENSOR

UNITS

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)

LASER DETECTING SET – FAILS SELF-TEST

FOR ONE OR BOTH RIGHT SIDE SENSOR

UNITS

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)

LASER DETECTING SET – FALSE ALARMS FOR

ONE OR MORE SENSOR UNITS

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)

LASER DETECTING SET – NO SELF–TEST

DISPLAY

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)

LASER DETECTING SET – SYNTHETIC VOICE

MESSAGE DISTORTED OR GARBLED

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)

LAT ACTUATOR NO–GO LH XMSN BAY

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

TM 1–1520–238–T–2

2–101

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LEAKAGE OCCURS FROM FUEL CELLS

DURING PRESSURE REFUELING

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

LEAKS ARE FOUND (FUEL TRANSFERRING

FROM EXTERNAL TANKS)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

LEFT AND RIGHT PILOT DIRECTIONAL PEDAL

DOES NOT TRAVEL FULL FORWARD TO ITS

STOP (PILOT CYCLIC STICK: FORCE TRIM

SWITCH SET TO OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

LEFT AND RIGHT DISPLAYS ARE INCORRECT

(CPG DPLR NAV PANEL: DISPLAY SWITCH

SET TO GS/TK AND KEYBOARD KEYS

ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT AND RIGHT DISPLAYS ARE INCORRECT

(CPG DPLR NAV PANEL: DISPLAY SWITCH

SET TO SPH/VAR KEYBOARD KEYS

ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT AND RIGHT DISPLAYS ARE INCORRECT

(CPG DPLR NAV PANEL: DISPLAY SWITCH

SET TO XTK/TKE)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT AND RIGHT DISPLAYS ARE INCORRECT

(CPG DPLR NAV PANEL: MODE SWITCH SET

TO SPH/VAR)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT AND RIGHT DISPLAYS ARE INCORRECT

(CPG DPLR NAV PANEL: MODE SWITCH SET

TO UTM AND DISPLAY SWITCH SET TO

WIND SP/DIR)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT AND RIGHT RED ANTI–COLLISION

LIGHTS DO NOT FLASH (PILOT EXT LT/ INTR

LT PANEL: ANTI COL SWITCH SET TO RED)

TM 1–1520–238–T–6 ANTI–COLLISION

LIGHTS
TM 1–1520–238–T–2

2–102

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LEFT AND RIGHT WHITE ANTI–COLLISION

LIGHTS DO NOT FLASH (PILOT EXT LT/ INTR

LT PANEL: ANTI COL SWITCH SET TO WHT)

TM 1–1520–238–T–6 ANTI–COLLISION

LIGHTS

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DEST DISP THUMBWHEEL SET TO H

AND KYBD ENTRIES MADE)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CDU: DEST DISP

THUMBWHEEL SET TO NUMBER DISPLAYED

ON TGT STR DISPLAY, DISPLAY SWITCH

SET TO DEST/TGT AND TGT STR KEY

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DISPLAY SWITCH SET TO DEST/TGT

AND DEST, DISP THUMBWHEEL SET TO P

AND KEYBOARD KEYS ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DISPLAY SWITCH SET TO

DIST/BRG/TIME AND FLY TO DEST

THUMBWHEEL SET TO POSITIONS 1, 3, 5, 7

AND 9)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DISPLAY SWITCH SET TO

DIST/BRG/TIME AND FLY TO DEST

THUMBWHEEL SET TO POSITIONS H, 2, 4, 6,

8 AND 0)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DISPLAY SWITCH SET TO DEST/TGT,

DEST DISP THUMBWHEEL SET TO 1 AND

KEYBOARD KEYS ACTIONED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128
TM 1–1520–238–T–2

2–103

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DISPLAY SWITCH SET TO DEST/TGT

AND DEST DIST THUMBWHEEL SET TO P)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: DISPLAY SWITCH SET TO PP)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 0)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 2)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 4)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 5)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 6)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 7)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 8)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128
TM 1–1520–238–T–2

2–104

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED AND DEST

DISP THUMBWHEEL SET TO 9)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: KYBD KEY PRESSED, DEST DISP

THUMBWHEEL SET TO 3 AND ENT KEY

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: MODE SWITCH SET TO BACKUP)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT, CENTER AND RIGHT DISPLAYS ARE NOT

LIGHTED CORRECTLY (CPG DPLR NAV

PANEL: MODE SWITCH SET TO LATT/LONG)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

LEFT DIRECTIONAL PEDAL DOES NOT REMAIN

IN POSITION (PILOT CYCLIC STICK: FORCE

TRIM SWITCH PRESSURE REMOVED FROM

FORCE TRIM RELEASE POSITION)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

LEFT FAB NORMAL FAN IS NOT OPERATING

(PILOT ECS PANEL: STBY FAN SWITCH SET

TO NORM)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

LEFT FAB STANDBY FAN IS NOT OPERATING

(CPG AUX/ANTI–ICE PANEL: STBY FAN

SWITCH SET TO STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

LEFT FAB STANDBY FAN IS NOT OPERATING

(PILOT ECS PANEL: STBY FAN SWITCH SET

TO STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

LEFT FORMATION LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: FORM

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 FORMATION LIGHTS
TM 1–1520–238–T–2

2–105

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LEFT INBOARD AND LEFT OUTBOARD PYLON

ACTUATORS DO NOT RETURN TO GROUND

STOW (PYLON ACTG SWITCH SET TO

DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

LEFT INBOARD PYLON ACTUATORS DOES

NOT RETURN TO GROUND STOW (PYLON

ACTG SWITCH SET TO DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

LEFT INBOARD PYLON DOES NOT MOVE

(PYLON ACTG SWITCH SET TO UP THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

LEFT MAIN WHEEL DOES NOT ROTATE

FREELY

TM 1–1520–238–T–4 MAIN LANDING

GEAR

LEFT MAIN WHEEL LOOSE TM 1–1520–238–T–4 MAIN LANDING

GEAR

LEFT NAVIGATION LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: NAV SWITCH

SET TO DIM OR BRT)

TM 1–1520–238–T–6 NAVIGATION LIGHTS

LEFT OUTBOARD PYLON ACTUATOR DOES

NOT GO TO FLIGHT STOW (PYLON ACTG

SWITCH SET TO UP)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

LEFT OUTBOARD PYLON ACTUATORS DOES

NOT RETURN TO GROUND STOW (PYLON

ACTG SWITCH SET TO DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

LEFT OUTBOARD PYLON DOES NOT MOVE

(PYLON ACTG SWITCH SET TO UP THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

LEFT RED ANTI–COLLISION LIGHT DOES NOT

FLASH (PILOT EXT LT/INTR LT PANEL: ANTI

COL SWITCH SET TO RED)

TM 1–1520–238–T–6 ANTI–COLLISION

LIGHTS

LEFT, RIGHT AND CENTER TGT STR, FLY TO

DEST, DEST DISP INDICATORS; MEM AND

MAL INDICATORS; TGT STR, KYBD, CLR,

AND ENT KEYS AND ALL KEYBOARD KEYS

ARE LIGHTED (CPG DPLR NAV PANEL:

MODE SWITCH SET TO LAMP TEST)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128
TM 1–1520–238–T–2

2–106

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LEFT, RIGHT AND TAIL NAVIGATION LIGHTS

DO NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: NAV SWITCH SET TO DIM OR BRT)

TM 1–1520–238–T–6 NAVIGATION LIGHTS

LEFT, RIGHT, TAIL AND FUSELAGE

FORMATION LIGHTS DO NOT LIGHT (PILOT

EXT LT/INTR LT PANEL: FORM CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–6 FORMATION LIGHTS

LEFT WHITE ANTI–COLLISION LIGHT DOES

NOT FLASH (PILOT EXT LT/INTR LT PANEL:

ANTI COL SWITCH SET TO WHT)

TM 1–1520–238–T–6 ANTI–COLLISION

LIGHTS

LETTER E DOES NOT APPEAR AT THE LOWER

RIGHT HAND WINDOW OF TEST SET

VIEWFINDER (PILOT IFF TRANSPONDER

CONTROL PANEL: IDENT/OUT/MIC SWITCH

SET TO OUT) (AN/APM–424 TRANSPONDER

TEST SET: TEST SEQ SWITCH PRESSED

AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

LETTER L DOES NOT APPEAR ON AND VIDEO

DISPLAYED ON HOD; AND LS, THEN C AND

R (R FLASHING) DO NOT APPEAR ON RIGHT

SIDE OF HOD (DEK: DATA ENTRY SWITCH

SET TO SP1 AND R SHIFT AND 3 KEYS

PRESSED) (CPG MSL PANEL: MAN

ADV/DE–ICE SWITCH MOMENTARILY

PRESSED)

TM 9–1427–475–20 HME SYSTEM

LETTER P DOES NOT APPEAR AT THE LOWER

RIGHT HAND WINDOW OF TEST SET

VIEWFINDER (PILOT IFF TRANSPONDER

CONTROL PANEL: IDENT/OUT/MIC SWITCH

SET TO IDENT) (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

LOBL CONSTRAINTS BOX MISSILE SEEKERS

AND TADS TURRET DO NOT MOVE WITH

MAN TRK SWITCH (ORT: SLAVE PRESSED

AND MAN TRK SWITCH ACTIONED)

TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

2–107

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LOBL LARGE CONSTRAINTS BOX DOES NOT

REDUCE TO LOAL SMALL CONSTRAINTS

BOX SIZE (PLT MSL PANEL: LOAL SWITCH

SET TO DIR)

TM 9–1427–475–20 HME SYSTEM

LOBL NORM AND UP=A (A FLASHING) DO NOT

APPEAR ON VDU (PILOT MSL PANEL: LSR

CODE SWITCH SET TO UPPER)

TM 9–1427–475–20 HME SYSTEM

LOBL NORM DOES NOT APPEAR ON HOD

(CPG MSL PANEL: MODE SWITCH SET TO

NORM AND CPG FCP: MSL CHAN SEL

SWITCH SET TO UPR)

TM 9–1427–475–20 HME SYSTEM

LOBL STBY AND LOBL LARGE DASHED

CONSTRAINTS BOX DO NOT APPEAR ON

HOD (CPG FCP: CHAN SEL SWITCH SET TO

UPR)

TM 9–1427–475–20 HME SYSTEM

LOCKING TAB IS BROKEN OR FILLER CAP

DOES NOT ROTATE SMOOTHLY

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

LONG ACTUATOR NO–GO RH XMSN BAY

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

LOWER CHANNEL CANNOT BE SELECTED

(PILOT MSL PANEL: LOAL SWITCH SET TO

LO AND LSR CODE SWITCH SET TO

LOWER)

TM 9–1427–475–20 HME SYSTEM

LOW ROTOR AUDIO WARNING IS NOT HEARD

IN BOTH HEADSETS (PILOT ENG–RTR

RPM% INDICATOR: NP BETWEEN 80% TO

85%)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

LOW RPM ROTOR INDICATOR IS NOT LIGHTED

(CPG MASTER CAUTION/ WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

LOW RPM ROTOR INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–108 Change 7

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LOW RPM ROTOR INDICATOR REMAINS

LIGHTED ABOVE 93% NR (PILOT ENG–RTR

RPM% INDICATOR : NP BETWEEN 80% TO

85%)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

LOW RPM ROTOR INDICATORS ARE NOT

LIGHTED (MASTER CAUTION/WARNING

PANELS: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

LSR DET CIRCUIT BREAKER (CB96) – DOES

NOT STAY CLOSED OR 28 VDC IS NOT

PRESENT AT (A76) J1–AA

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

LT ANTI COL CIRCUIT BREAKER (CB40) DOES

NOT STAY CLOSED (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

LT CAUT CIRCUIT BREAKER (CB21) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

LT CAUT CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 1–1520–238–T–7 STABILATOR

LT CAUT CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

LT FORM CIRCUIT BREAKER (CB90) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

LT NAV CIRCUIT BREAKER (CB73) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

LT PRI CIRCUIT BREAKER (CB39) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)
TM 1–1520–238–T–2

2–109

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

LT SRCH/LDG CIRCUIT BREAKER (CB22) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

LT SRCH/LDG CONTR CIRCUIT BREAKER

(CB80) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

LT UTIL SEC CIRCUIT BREAKER (CB23) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

LT UTIL SEC CIRCUIT BREAKER (CB23) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 PILOT UTILITY AND

SECONDARY

LIGHTS

LT UTIL SEC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

M 1.0 DOES NOT APPEAR IN RANGE SOURCE

MESSAGE ON PILOT VDU (PILOT ROCKET

CONTROL PANEL: RANGE SWITCH SET TO

1.0KM)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

MA INDICATOR IS NOT LIGHTED (PILOT FIRE

CONTROL PANEL: MASTER SWITCH SET TO

OFF)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

MAIN ROTOR AUTOROTATION RPM TOO HIGH

OR LOW

TM 1–1520–238–T–4 AUTOROTATION

RPM CHECK/

ADJUSTMENT

MAIN ROTOR BLADE ASSEMBLY DOES NOT

ROTATE (PILOT POWER QUADRANT: RTR BK

SWITCH SET TO OFF)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

MAIN ROTOR BLADES OUT OF TRACK OR

BALANCE

TM 1–1520–238–T–4 MAIN ROTOR TRACK

AND BALANCE
TM 1–1520–238–T–2

2–110

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MAIN ROTOR HEATER NO–GO MAIN ROTOR

APPEARS ON HOD (APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

MAIN ROTOR OR TAIL ROTOR DO NOT

ROTATE (ENGINE START SEQUENCE

COMPLETED)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

MAINTENANCE LIGHT IN AFT AVIONICS BAY

DOES NOT LIGHT (RHEOSTAT ROTATED TO

BRT)

TM 1–1520–238–T–6 MAINTENANCE

LIGHTS

MAINTENANCE LIGHT IN RIGHT FAB BAY DOES

NOT LIGHT (RHEOSTAT ROTATED TO BRT)

TM 1–1520–238–T–6 MAINTENANCE

LIGHTS

MAINT LT CIRCUIT BREAKER (CB8) DOES NOT

STAY CLOSED (BATTERY CONNECTED)

TM 1–1520–238–T–6 MAINTENANCE

LIGHTS

MA LAMP DOES NOT START FLASHING WITHIN

6 SECONDS AFTER APPEARANCE OF

SECOND STROBE (RADAR WARNING

CONTROL UNIT: DSCRM SWITCH SET TO

ON AND SELF TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

MA LAMP FAILS TO FLASH AFTER 6 SECONDS

(RADAR WARNING CONTROL PANEL:

DSCRM SWITCH SET TO OFF AND SELF

TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

MA LAMP FAILS TO FLASH AND ALARM TONE

IS NOT PRESENT AFTER 6 SECONDS

(RADAR WARNING CONTROL PANEL:

DSCRM SWITCH SET TO ON AND AFTER

ONE MINUTE SELF TEST KEY PRESSED)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

MAL AND MEM INDICATORS DO NOT LIGHT,

DIM OR BRIGHTEN (CPG INTR LT PANEL:

INST CONTROL ROTATED FROM BRT TO

OFF THEN BACK TO BRT)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128
TM 1–1520–238–T–2

Change 4 2–111

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MAN STAB AND MASTER CAUTION

INDICATORS DO NO FLASH

TM 1–1520–238–T–7 STABILATOR

MAN STAB INDICATOR DOES NOT REMAIN

LIGHTED WHEN ND/NU SWITCH IS

RELEASED

TM 1–1520–238–T–7 STABILATOR

MAN STAB INDICATORS DO NOT FLASH (PILOT

AFT CIRCUIT BREAKER PANEL: STAB AUTO

AC AND STAB AUTO DC CIRCUIT BREAKERS

OPENED)

TM 1–1520–238–T–7 STABILATOR

MAN STAB INDICATORS DO NOT FLASH (PITOT

TESTER: AIRSPEED SET TO 83 ±2 KNOTS)

TM 1–1520–238–T–7 STABILATOR

MAN STAB INDICATORS DO NOT LIGHT

(MASTER CAUTION/WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–7 STABILATOR

MAN STAB INDICATORS FLASH (PITOT

TESTER: AIRSPEED SET TO 60 ±2 KNOTS)

TM 1–1520–238–T–7 STABILATOR

MAN STAB INDICATORS ON AUTO MODE DOES

NOT ENGAGE AND STAB POS INDICATORS

DO NOT GO TO 25 ±2° ND

TM 1–1520–238–T–7 STABILATOR

MAN STAB MOVES DOWN BUT NOT UP TM 1–1520–238–T–7 STABILATOR

MAN STAB MOVES UP BUT NOT DOWN TM 1–1520–238–T–7 STABILATOR

MANUAL 1000 MTRS AND RANGE DOES NOT

APPEAR ON HOD (DEK: RANGE ENTERED)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

MASTER CAUTION INDICATOR IS NOT

LIGHTED AND FLASHING (CPG MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

MASTER CAUTION INDICATOR IS NOT

LIGHTED AND FLASHING (PILOT MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–112

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MASTER CAUTION INDICATOR LIGHTS (PILOT

COLLECTIVE STICK: RESET PUSHBUTTON

PRESSED)

TM 1–1520–238–T–7 STABILATOR

MASTER CAUTION INDICATORS DO NOT

FLASH (MASTER CAUTION/WARNING

PANELS: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–7 STABILATOR

MASTER CAUTION INDICATORS DO NOT

FLASH (PITOT TESTER: AIRSPEED SET TO

83 ±2 KNOTS)

TM 1–1520–238–T–7 STABILATOR

MASTER CAUTION INDICATORS REMAIN

LIGHTED (CPG COLLECTIVE STICK: RESET

BUTTON PRESSED)

TM 1–1520–238–T–7 STABILATOR

MASTER CAUTION/WARNING PANEL

INDICATORS ARE NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

MF, SF AND THEN FAIL FAIL APPEAR ON HOD

FOR THE INSTALLED LAUNCHER (PILOT

FCP: MASTER SWITCH SET TO ARM AND

CPG FCP: CPG SWITCH SET TO ARM)

TM 9–1427–475–20 HME SYSTEM

MIN DISPLAY DOES NOT INDICATE

INCREASING TIME (ORT: VID REC SWITCH

ACTIONED)

TM 11–1520–238–23–2 VIDEO RECORDER

MIN DISPLAY DOES NOT OPERATE PROPERLY

(VIDEO RECORDER CONTROL PANEL:

MODE SWITCH SET TO RWND)

TM 11–1520–238–23–2 VIDEO RECORDER

MIN DISPLAY IS NOT LIGHTED (VIDEO

RECORDER CONTROL PANEL: MODE

SWITCH SET TO STBY)

TM 11–1520–238–23–2 VIDEO RECORDER

MIN DISPLAY IS NOT STILL (VIDEO RECORDER

CONTROL PANEL: VIDEO RECORDER IN

STILL MODE)

TM 11–1520–238–23–2 VIDEO RECORDER

MISSILE 1 NO–GO LT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

2–113

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MISSILE 1 NO–GO LT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 1 NO–GO RT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 1 NO–GO RT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 2 NO–GO LT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 2 NO–GO LT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 2 NO–GO RT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 2 NO–GO RT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 3 NO–GO LT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 3 NO–GO LT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 3 NO–GO RT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 3 NO–GO RT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 4 NO–GO LT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 4 NO–GO LT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE 4 NO–GO RT INBD APPEARS ON HOD TM 9–1427–475–20 HME SYSTEM

MISSILE 4 NO–GO RT OUTBD APPEARS ON

HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE FAILS TO CODE (CPG FCP: CHAN SEL

SWITCH SET TO UPR)

TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

2–114

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MISSILE INDICATOR ON CPG CAUTION/

WARNING PANEL LIGHTS (DEK: DATA

ENTRY SWITCH SET TO STANDBY) (CPG

FCP: MSL SWITCH SET TO OFF FOR TWO

TO THREE MINUTES TO ALLOW MISSILE

SEEKER TO SPIN DOWN, THEN MSL

SWITCH SET TO ON)

TM 9–1427–475–20 HME SYSTEM

MISSILE LAUNCHER NO–GO LT INBD APPEARS

ON HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE LAUNCHER NO–GO LT OUTBD

APPEARS ON HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE LAUNCHER NO–GO LT OUTBD AND

MISSILE LAUNCHER NO–GO LT INBD

APPEARS ON HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE LAUNCHER NO–GO RT INBD

APPEARS ON HOD

TM 9–1427–475–20 HME SYSTEM

MISSILE LAUNCHER NO–GO RT OUTBD

APPEARS ON HOD

TM 9–1427–475–20 HME SYSTEM

MISSION ARM CONTR CIRCUIT BREAKER

(CB46) DOES NOT STAY CLOSED

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

MISSION ARM CONTR CIRCUIT BREAKER

(CB46) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

MISSION ARM CONTR CIRCUIT BREAKER

(CB46) DOES NOT STAY CLOSED (PYLON

ACTG SWITCH ACTIONS PYLONS UP THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

MISSION ARM CONTR CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

MISSION EL AC CIRCUIT BREAKER (CB92)

DOES NOT STAY CLOSED

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL
TM 1–1520–238–T–2

2–115

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MISSION EL AC CIRCUIT BREAKER (CB92)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

MISSION EL AC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

MISSION EL AC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

MISSION EL DC CIRCUIT BREAKER (CB93)

DOES NOT STAY CLOSED

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

MISSION EL DC CIRCUIT BREAKER (CB93)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

MISSION EL DC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

MISSION EL DC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

MISSION FC DC CIRCUIT BREAKER (CB50)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

MISSION FC DC CIRCUIT BREAKER DOES NOT

STAY CLOSED (CPG FCP: RKT SWITCH SET

TO NORM)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MISSION FC DC CIRCUIT BREAKER DOES NOT

STAY CLOSED (CPG FCP: RKT SWITCH SET

TO GND STOW)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MISSION FC DC CIRCUIT BREAKER DOES NOT

STAY CLOSED (SQUAT SWITCH FIXTURE

INSTALLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM
TM 1–1520–238–T–2

2–116

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MISSION FC DC CIRCUIT BREAKER OPENS

(CPG FCP: GUN SWITCH SET TO FXD)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MISSION FC DC CIRCUIT BREAKER OPENS

(CPG FCP: MSL SWITCH SET TO ON)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MISSION FC DC CIRCUIT BREAKER OPENS

(CPG FCP: SYSTEM TADS SWITCH SET TO

TADS) (CPG COLLECTIVE STICK: NVS

SWITCH SET TO TADS)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MISSION FC DC CIRCUIT BREAKER OPENS

(ORT LH GRIP: RKT/GUN/MSL SWITCH SET

TO GUN)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MISSION IHADSS CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 9–1270–221–23 IHADSS

MISSION IR JAM PWR CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 11–1520–238–23–2 IR JAMMER SYSTEM

AN/ALQ–144

MISSION JETT CIRCUIT BREAKER (CB89)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

MISSION PEN AIDS CONTR CIRCUIT BREAKER

(CB49) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

MISSION PEN AIDS CONTR CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 11–1520–238–23–2 IR JAMMER SYSTEM

AN/ALQ–144

MISSION PEN AIDS CONTR CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

MISSION PNVS AC CIRCUIT BREAKER (CB81)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)
TM 1–1520–238–T–2

2–117

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MISSION PNVS DC CIRCUIT BREAKER (CB61)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

MISSION RDR JAM AC CIRCUIT BREAKER

(CB74) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

MISSION RDR JAM AC CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

MISSION RDR JAM DC CIRCUIT BREAKER

(CB72) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – PILOT

STATION)

MISSION RDR JAM DC CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

MISSION RKT ELEX CIRCUIT BREAKER (CB47)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

MISSION RKT ELEX CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

MISSION SYM GEN CIRCUIT BREAKER (CB45)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

MISSION SYM GEN CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 11–1520–238–23–2 SYMBOL

GENERATOR
TM 1–1520–238–T–2

2–118

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MODE UTM DOES NOT CHANGE TO MODE L/L

(CDU: VAB NEXT TO DISPLAYED WORD

ADMIN PRESSED AND THEN VAB NEXT TO

DISPLAYED WORDS MODE UTM PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

MOISTURE LEVEL TOO HIGH (PILOT ECS

PANEL: TEMP CONTROL SET TO COLD OR

WARM)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

MSL ARM CIRCUIT BREAKER (CB27) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – CPG

STATION)

MSL DC ELEC CIRCUIT BREAKER (CB17) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

MSL FAIL APPEARS ON HOD (CPG CYCLIC

STICK: R/G/M/C SWITCH SET TO M)

TM 9–1427–475–20 HME SYSTEM

MSL L INBD LCHR AC CIRCUIT BREAKER

(CB23) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

MSL L INBD LCHR DC CIRCUIT BREAKER

(CB24) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – CPG

STATION)

MSL L OUTBD LCHR AC CIRCUIT BREAKER

(CB26) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)
TM 1–1520–238–T–2

2–119

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MSL L OUTBD LCHR DC CIRCUIT BREAKER

(CB25) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – CPG

STATION)

MSL R INBD LCHR AC CIRCUIT BREAKER

(CB21) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

MSL R INBD LCHR DC CIRCUIT BREAKER

(CB22) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – CPG

STATION)

MSL R OUTBD LCHR AC CIRCUIT BREAKER

(CB18) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

MSL R OUTBD LCHR DC CIRCUIT BREAKER

(CB19) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

GROUND CIRCUIT

BREAKERS – CPG

STATION)

MSL SEL? DOES NOT APPEAR ON HOD (CPG

CYCLIC STICK: R/G/M/C SWITCH

MOMENTARILY SET TO M)

TM 9–1427–475–20 HME SYSTEM

MSL SEL? DOES NOT APPEAR ON HOD (ORT

LH GRIP: RKT/GUN/MSL SWITCH SET TO

MSL)

TM 9–1427–475–20 HME SYSTEM

MU APPEARS ON HOD (PILOT FCP: MASTER

SWITCH SET TO ARM AND CPG FCP: CPG

SWITCH SET TO ARM)

TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

2–120

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MU MESSAGE DOES NOT APPEAR ON FOR

ANY SINGLE LAUNCHER (LAUNCHER SET

TO UNLATCHED POSITION)

TM 9–1427–475–20 HME SYSTEM

MUX COMMUNICATION NO–GO CPG

COMPARTMENT APPEARS ON HOD (PRI

BUS DETACHED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MUX COMMUNICATION NO–GO CPG

COMPARTMENT APPEARS ON HOD (SEC

BUS DETACHED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

MUX CPG CIRCUIT BREAKER (CB15) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

MUX FAB L CIRCUIT BREAKER (CB10) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

MUX FAB R CIRCUIT BREAKER (CB9) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

MUX L PYL INBD CIRCUIT BREAKER (CB1)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

MUX L PYL OUTBD CIRCUIT BREAKER (CB2)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)
TM 1–1520–238–T–2

2–121

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

MUX R PYL INBD CIRCUIT BREAKER (CB5)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

MUX R PYL OUTBD CIRCUIT BREAKER (CB6)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

CPG STATION)

NA APPEARS ON HOD (PILOT FCP: MASTER

SWITCH SET TO ARM AND CPG FCP: CPG

SWITCH SET TO ARM)

TM 9–1427–475–20 HME SYSTEM

NAV AIR DATA AC CIRCUIT BREAKER (CB84)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

NAV AIR DATA AC CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 9–1230–476–20–2 AIR DATA SYSTEM

NAV AIR DATA DC CIRCUIT BREAKER (CB69)

DOES NOT STAY CLOSED (PILOT ANTI ICE

PANEL: PITOT ICE DET AD SNSR SWITCH

SET TO ON)

TM 1–1520–238–T–8 PITOT ANTI–ICE

NAV AIR DATA DC CIRCUIT BREAKER (CB69)

DOES NOT STAY CLOSED (PILOT ANTI ICE

PANEL: PITOT ICE DET AD SNSR SWITCH

SET TO ON)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

NAV AIR DATA DC CIRCUIT BREAKER (CB69)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

NAV AIR DATA DC CIRCUIT BREAKER DOES

NOT STAY CLOSED

TM 9–1230–476–20–2 AIR DATA SYSTEM
TM 1–1520–238–T–2

2–122

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

NAV AIR DATA DC CIRCUIT BREAKER DOES

NOT STAY CLOSED (PILOT ANTI ICE PANEL:

PITOT ICE DET AD SNSR SWITCH SET TO

ON THEN OFF AND CPG AUX/ANTI–ICE

PANEL: ADSS SWITCH SET TO OFF)

TM 9–1230–476–20–2 AIR DATA SYSTEM

NAV B CONTROL DOES NOT ADJUST VOLUME

(CPG AND PILOT CSC PANELS: NAV B

CONTROL ADJUSTED)

TM 11–1520–238–23–2 VIDEO RECORDER

NAV DPLR CIRCUIT BREAKER (CB82) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

NAV DPLR CIRCUIT BREAKER DOES NOT STAY

CLOSED (EXTERNAL ELECTRICAL POWER

APPLIED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

NAV DPLR CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–128

NAV HARS AC CIRCUIT BREAKER (CB42) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

NAV HARS AC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 HARS

NAV HARS DC CIRCUIT BREAKER (CB54)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

NAV HARS DC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 HARS
TM 1–1520–238–T–2

Change 4 2–122.1

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

NAV HSI CIRCUIT BREAKER (CB43) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

NAV HSI CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

NAV TOP LEVEL POWER ON PRESENT

POSITION PAGE IS DISPLAYED

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

NAV VDU CIRCUIT BREAKER (CB91) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)

ND/NU SWITCH SET TO ND BOTTOM PISTON

FAILS TO MOVE STABILATOR

TM 1–1520–238–T–7 STABILATOR

ND/NU SWITCH SET TO ND TOP PISTON FAILS

TO MOVE STABILATOR

TM 1–1520–238–T–7 STABILATOR

ND/NU SWITCH SET TO NU TOP PISTON FAILS

TO MOVE STABILATOR (BOTTOM STAB

ACTUATOR EXTENDS FULLY)

TM 1–1520–238–T–7 STABILATOR

ND/NU SWITCH SET TO NU BOTTOM PISTON

FAILS TO MOVE STABILATOR (TOP STAB

ACTUATOR EXTENDS FULLY)

TM 1–1520–238–T–7 STABILATOR

NGB 1 OIL PRESSURE DISPLAY IS NOT 00 LB TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

NGB 1 OIL TEMPERATURE DISPLAY DOES NOT

INDICATE –31° C

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

NGB 2 OIL PRESSURE DISPLAY IS NOT 00 LB TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

NGB 2 OIL TEMPERATURE DISPLAY DOES NOT

INDICATE –31° C

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC
TM 1–1520–238–T–2

2–122.2

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

NGB (LEFT OR RIGHT) DIFFERENTIAL

PRESSURE INDICATOR IS EXTENDED

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

NGB OIL LOSS IS INDICATED TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

NG RPM% DIGITAL READOUT 1 AND 2 DOES

NOT STABILIZE AT 22% MINIMUM

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

NG RPM% DIGITAL READOUT 1 DOES NOT

STABILIZE AT 22% MINIMUM (PILOT POWER

QUADRANT: ENG START NO 2 SWITCH SET

TO IGN OVRD)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

TM 1–1520–238–T–2

(2–123 blank)/2–124 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

NITROGEN INERT CIRCUIT BREAKER (CB94)

DOES NOT STAY CLOSED

TM 1–1520–238–T–7 NITROGEN

INERTING SYSTEM

NITROGEN INERT MONITOR INDICATOR IS

NOT BLACK

TM 1–1520–238–T–7 NITROGEN

INERTING SYSTEM

NITROGEN INERT MONITOR INDICATOR IS

NOT BLACK AND WHITE (FAIL) (NITROGEN

INERT MONITOR INDICATOR: PRESS TO

TEST SWITCH PRESSED FOR 10 SECONDS)

TM 1–1520–238–T–7 NITROGEN

INERTING SYSTEM

NIU IS NOT OPERATING (UTILITY RECEPTACLE

CIRCUIT BREAKER BOX: NITROGEN INERT

CIRCUIT BREAKER CLOSED)

TM 1–1520–238–T–7 NITROGEN

INERTING SYSTEM

NO DTC MESSAGE REMAINS WITH DTC

INSTALLED (ADD)

TM 1–1520–238–T–3 DTU (ADD)

NOE/APRCH SWITCH DISENGAGES OR STAB

INDICATORS DO NOT INDICATE 25 ±2°

TM 1–1520–238–T–7 STABILATOR

NO–GO INDICATOR LIGHTS AT THE END OF

THE BITE TEST (PILOT INSTRUMENT PANEL:

JAM/TEST/GO/NO–GO INDICATOR

MOMENTARILY PRESSED AND RELEASED)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136

NP FLUCTUATES (PILOT POWER QUADRANT:

ENGINE NO 1 PWR LEVER SET TO

LOCKOUT THEN MOVED BETWEEN FLY AND

IDLE)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

NP FLUCTUATES (PILOT POWER QUADRANT:

ENGINE NO 2 PWR LEVER SET TO

LOCKOUT THEN MOVED BETWEEN FLY AND

IDLE)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

NR RPM% DIGITAL READOUT 2 DOES NOT

STABILIZE AT 22% MINIMUM (PILOT POWER

QUADRANT: ENG START NO 1 SWITCH SET

TO IGN OVRD)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM
TM 1–1520–238–T–2

2–125

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

OAS ARM ASSEMBLY DOES NOT ROTATE

(PILOT ANTI ICE PANEL: PITOT ICE DET AD

SNSR SET TO OFF AND CPG AUX/ANTI–ICE

PANEL: ADSS SWITCH SET TO ADSS)

TM 9–1230–476–20–2 AIR DATA

SUBSYSTEM

OFF FLAG ON SAI IS NOT VISIBLE (PULL TO

CAGE KNOB ROTATED)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

OFF FLAG ON SAI IS VISIBLE (PULL TO CAGE

KNOB ROTATED COUNTERCLOCKWISE)

(PILOT CENTER CIRCUIT BREAKER PANEL:

STBY ATTD CIRCUIT BREAKER CLOSED)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

OIL BYP ENG 1 INDICATOR IS LIGHTED BUT

OIL FILTER IS NOT CLOGGED (ENGINE 1

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

OIL BYP ENG 1 INDICATOR IS NOT LIGHTED

(PILOT CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

OIL BYP ENG 2 INDICATOR IS LIGHTED BUT

OIL FILTER IS NOT CLOGGED (ENGINE 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

OIL BYP ENG 2 INDICATOR IS NOT LIGHTED

(PILOT CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

OIL BYP PRI HYD INDICATOR IS NOT LIGHTED

(EXTERNAL PRIMARY HYDRAULIC POWER

APPLIED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

OIL BYP PRI UTIL INDICATOR IS NOT LIGHTED

(EXTERNAL UTILITY HYDRAULIC POWER

APPLIED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM
TM 1–1520–238–T–2

2–126

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

OIL HOT MAIN XMSN 1 INDICATOR IS LIGHTED

(MASTER CAUTION/WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL HOT MAIN XMSN 1 INDICATOR LIGHTS

AND HOD DISPLAYS A 70° C TO 95° C OIL

TEMPERATURE READING FOR XMSN 1

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL HOT MAIN XMSN 1 INDICATOR LIGHTS

AND HOD DISPLAYS A 96° C AND 139° C OIL

TEMPERATURE READING FOR XMSN 1

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL HOT MAIN XMSN 2 INDICATOR IS LIGHTED

(MASTER CAUTION/WARNING PANELS:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL HOT MAIN XMSN 2 INDICATOR LIGHTS

AND HOD DISPLAYS A 70° C TO 95° C OIL

TEMPERATURE READING FOR XMSN 2

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL HOT MAIN XMSN 2 INDICATOR LIGHTS

AND HOD DISPLAYS A 96° C TO 139° C OIL

TEMPERATURE READING FOR XMSN 2

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL HOT NOSE GRBX 1 INDICATOR IS LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL HOT NOSE GRBX 1 INDICATOR LIGHTS

AND HOD DISPLAYS A 103° C TO 120° C OIL

TEMPERATURE READING FOR NGB 1

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL HOT NOSE GRBX 1 INDICATOR LIGHTS

AND HOD DISPLAYS A 121° C AND 139° C

OIL TEMPERATURE READING FOR NGB 1

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC
TM 1–1520–238–T–2

2–127

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

OIL HOT NOSE GRBX 2 INDICATOR IS LIGHTED

(PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST INDICATOR

PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL HOT NOSE GRBX 2 INDICATOR LIGHTS

AND HOD DISPLAYS A 103° C TO 120° C OIL

TEMPERATURE READING FOR NGB 2

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL HOT NOSE GRBX 2 INDICATOR LIGHTS

AND HOD DISPLAYS A 121° C TO 139° C OIL

TEMPERATURE READING FOR NGB 2

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL LOW PRI HYD INDICATOR IS LIGHTED

(EXTERNAL PRIMARY HYDRAULIC POWER

APPLIED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

OIL LOW UTIL HYD INDICATOR IS LIGHTED

(EXTERNAL UTILITY HYDRAULIC POWER

APPLIED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

OIL PSI ACC PUMP INDICATOR IS LIGHTED

(APU OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL PSI ACC PUMP INDICATOR IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL PSI ENG 1 INDICATOR IS LIGHTED

(ENGINE 1 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

OIL PSI ENG 1 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

OIL PSI ENG 2 INDICATOR IS LIGHTED

(ENGINE 2 OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

OIL PSI ENG 2 INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)
TM 1–1520–238–T–2

2–128

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

OIL PSI MAIN XMSN 1 INDICATOR IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL PSI MAIN XMSN 1 INDICATOR LIGHTS AND

HOD DISPLAYS A 29 LB TO 49 LB READING

FOR XMSN 1 OIL PRESSURE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL PSI MAIN XMSN 1 INDICATOR LIGHTS AND

HOD DISPLAYS A 50 LB TO 85 LB READING

FOR XMSN 1 OIL PRESSURE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL PSI MAIN XMSN 2 INDICATOR IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL PSI MAIN XMSN 2 INDICATOR LIGHTS AND

HOD DISPLAYS A 29 LB TO 49 LB READING

FOR XMSN 2 OIL PRESSURE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL PSI MAIN XMSN 2 INDICATOR LIGHTS AND

HOD DISPLAYS A 50 LB TO 85 LB READING

FOR XMSN 2 OIL PRESSURE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL PSI NOSE GRBX 1 INDICATOR IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL PSI NOSE GRBX 1 INDICATOR LIGHTS AND

HOD DISPLAYS A 29 LB TO 54 LB READING

FOR NGB 1 OIL PRESSURE (ENGINES 1 AND

2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL PSI NOSE GRBX 1 INDICATOR LIGHTS AND

HOD DISPLAYS A 55 LB TO 65 LB READING

FOR NGB 1 OIL PRESSURE (ENGINES 1 AND

2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC
TM 1–1520–238–T–2

2–129

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

OIL PSI NOSE GRBX 2 INDICATOR IS NOT

LIGHTED (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

OIL PSI NOSE GRBX 2 INDICATOR LIGHTS AND

HOD DISPLAYS A 29 LB TO 54 LB OIL

PRESSURE (ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OIL PSI NOSE GRBX 2 INDICATOR LIGHTS AND

HOD DISPLAYS A 55 LB TO 65 LB OIL

PRESSURE (ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

OMNI DIR AIRSPEED SENSOR NO–GO MAIN

ROTOR MAST APPEARS ON HOD

TM 9–1230–476–20–2 AIR DATA SYSTEM

OMNIDIRECTIONAL AIRSPEED SENSOR

HEATERS DO NOT HEAT (PILOT ANTI ICE

PANEL: PITOT ICE DET AD SNSR SWITCH

SET TO ON FOR 6 SECONDS THEN SET TO

OFF) (CPG AUX/ANTI–ICE PANEL: ADSS

SWITCH SET TO OFF)

TM 9–1230–476–20–2 AIR DATA SYSTEM

ONE OR MORE CPG GLARESHIELD

SECONDARY LIGHTS DO NOT LIGHT IN

BOTH SWITCH POSITIONS (CPG INTR LT

PANEL: FLOOD CONTROL ROTATED TO DIM

AND THEN TO BRT)

TM 1–1520–238–T–6 CPG UTILITY AND

SECONDARY

LIGHTS

ONE OR MORE LIGHTS ARE NOT LIGHTED IN

BOTH POSITIONS (PILOT EXT LT/INTR LT

PANEL: FLOOD CONTROL ROTATED TO DIM

THEN TO BRT)

TM 1–1520–238–T–6 PILOT UTILITY AND

SECONDARY

LIGHTS

ONE STROBE DOES NOT APPEAR AT 12

O’CLOCK AND ONE STROBE AT 6 O’CLOCK

WITHIN 4 SECONDS (RADAR WARNING

CONTROL UNIT: DSCRM SWITCH SET TO

ON AND SELF TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

ONLY ONE PYLON DOES NOT MOVE (PYLON

ACTG SWITCH ACTIONS PYLONS UP THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL
TM 1–1520–238–T–2

2–130

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

OPTICAL RELAY TUBE EDGE–LIGHTS DO NOT

LIGHT (CPG INTR LT PANEL: L CSL AND R

CSL CONTROL SET AT DESIRED LEVEL)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PARKING BRAKE HANDLE DOES NOT

RETRACT TO RELEASE BRAKES (PARKING

BRAKE HANDLE PULLED)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

PARKING BRAKE HANDLE RETRACTS

(PARKING BRAKE SET)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

PAS MANIFOLD LOSES PRESSURE (ENGINE 1

OPERATING) (PILOT CENTER CIRCUIT

BREAKER PANEL: FUEL BST CIRCUIT

BREAKER OPENED)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

PAS OVERBOARD VENT DISCHARGING

PULSING AIR (APU OPERATING)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

PEDAL BINDS OR CHATTERING OCCURS

WHEN PEDAL IS MOVED FORWARD OR AFT

(PILOT CYCLIC STICK: FORCE TRIM SWITCH

SET TO OFF AND DIRECTIONAL PEDALS

MOVED FULL FORWARD)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

PEDAL DOES NOT REMAIN IN HALF FORWARD

POSITION (PILOT CYCLIC STICK: FORCE

TRIM SWITCH SET TO FORCE TRIM

RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

PEDAL DOES NOT RETURN TO CENTER

NEUTRAL POSITION (PILOT CYCLIC STICK:

FORCE TRIM SWITCH SET TO ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

PEDAL DOES NOT TRAVEL FULL FORWARD TO

ITS STOP (PILOT CYCLIC STICK: FORCE

TRIM SWITCH SET TO OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

PERIODIC TONE IS NOT CLEARED (SILENCED)

(PILOT STATION: PUSH TO TALK RADIO

SWITCH ACTIONED)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT
TM 1–1520–238–T–2

Change 4 2–130.1

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PERIODIC TONE IS NOT CLEARED (SILENCED)

(PILOT STATION: ANY RADIO PUSH TO TALK

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY

EQUIPMENT

PILOT ACCELEROMETER INDICATOR DOES

NOT LIGHT (PILOT EXT LT/INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT ACCELEROMETER INDICATOR, VSI,

BAROMETRIC ALTIMETER, MAGNETIC

COMPASS, AIRSPEED INDICATOR AND SAI

EDGE–LIGHTS DO NOT LIGHT (PILOT EXT

LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT AIRSPEED INDICATOR DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT AMBER FUEL XFR INDICATOR IS NOT

LIGHTED WITH TRANS SWITCH SET TO AFT

AND AFT TANK FULL

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AMBER FUEL XFR INDICATOR IS NOT

LIGHTED WITH ENGINE 1 CROSSFEED

VALVE CLOSED AND ENGINE 2 CROSSFEED

VALVE AT AFT (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AMBER FUEL XFR INDICATOR ARE

LIGHTED WITH PILOT TRANS SWITCH SET

TO OFF

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AMBER FUEL XFR INDICATORS ARE

LIGHTED WITH ENGINE 1 AND ENGINE 2

CROSSFEED VALVES AT AFT (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AMBER XFEED INDICATOR IS NOT

LIGHTED WITH ENGINE 1 CROSSFEED

VALVE CLOSED AND ENGINE 2 CROSSFEED

VALVE AT AFT (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AND CPG AMBER XFEED INDICATORS

ARE LIGHTED WITH ENGINE 1 AND ENGINE

2 CROSSFEED VALVES AT NORMAL (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AND CPG AMBER XFEED INDICATORS

ARE LIGHTED WITH ENGINE 1 AND ENGINE

2 CROSSFEED VALVES AFT (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

2–130.2 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT AND CPG ENG–RTR RPM% INDICATORS

DO NOT INDICATE ENGINE 1 NP (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT AND CPG ENG–RTR RPM% INDICATORS

DO NOT INDICATE NR (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT AND/OR CPG STAB POS INDICATORS

DO NOT INDICATE FULL UP POSITION (9

±2°), FULL DOWN (35 ±2°), OR OFF FLAG

APPEARS

TM 1–1520–238–T–7 STABILATOR

PILOT AND CPG TORQUE INDICATORS DO

NOT INDICATE ENGINE 1 TORQUE

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT AND CPG GREEN FUEL XFR

INDICATORS ARE LIGHTED WITH PILOT

FUEL TRANS SWITCH SET TO OFF (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AND CPG GREEN XFEED INDICATORS

ARE LIGHTED WITH ENGINE 1 AND ENGINE

2 CROSSFEED VALVES AT NORMAL (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AND CPG GREEN XFEED INDICATORS

ARE NOT LIGHTED WITH ENGINE 1 AND

ENGINE 2 CROSSFEED VALVES AT AFT

(ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AND CPG GREEN FUEL XFR

INDICATORS ARE NOT LIGHTED WITH

ENGINE 1 AND ENGINE 2 CROSSFEED

VALVES AT FORWARD (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT AND CPG TORQUE INDICATORS DO

NOT INDICATE ENGINE 2 TORQUE

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT APU FIRE PULL HANDLE DOES NOT

STAY IN PULLED POSITION (PILOT APU FIRE

TEST PANEL: APU FIRE PULL HANDLE

PULLED)

TM 1–1520–238–T–8 FIRE

EXTINGUISHERS

TM 1–1520–238–T–2

(2–131 blank)/2–132 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT ARM INDICATOR DOES NOT LIGHT

(PILOT FCP: MASTER ARM SWITCH SET TO

ARM) (SQUAT SWITCH FIXTURE INSTALLED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT ARM/SAFE INDICATOR IS NOT LIGHTED

(EXTERNAL ELECTRICAL POWER APPLIED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

PILOT ASE PANEL EDGE–LIGHT IS NOT

LIGHTED

TM 1–1520–238–T–7 DASE

PILOT BAROMETRIC ALTIMETER EDGE–

LIGHTING DOES NOT LIGHT (PILOT EXT

LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT BAROMETRIC ALTIMETER PRESSURE

READING IS NOT WITHIN ±70 FEET OF

AMBIENT PRESSURE

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT BRU TARGET IS NOT LIT (PILOT FCP:

IHADSS BRSIT SWITCH SET TO BRSIT)

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ADJUSTED)

TM 9–1270–221–23 IHADSS

PILOT BUCS FAIL INDICATOR IS LIGHTED (CPG

COLLECTIVE STICK: BUCS SELECT

TRIGGER SWITCH RELEASED)

TM 1–1520–238–T–7 DASE

PILOT BUCS FAIL INDICATOR IS NOT LIGHTED

(CPG COLLECTIVE STICK: BUCS SELECT

TRIGGER SWITCH PULLED)

TM 1–1520–238–T–7 DASE

PILOT BUCS ON INDICATOR IS NOT LIGHTED

(PILOT ASE PANEL: BUCS TST SWITCH SET

TO PLT)

TM 1–1520–238–T–7 DASE

PILOT BUCS ON INDICATOR REMAINS

LIGHTED MORE THAN 20 SECONDS (PILOT

ASE PANEL: BUCS TST SWITCH SET TO PLT)

TM 1–1520–238–T–7 DASE
TM 1–1520–238–T–2

Change 6 2–133

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT CLOCK DOES NOT RESET SWEEP

HAND AND ELAPSED TIME HAND (KNOB

PUSHED ONE TIME)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

PILOT CLOCK DOES NOT RUN AFTER

WINDING

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

PILOT CLOCK EDGE–LIGHTING DOES LIGHT

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

PILOT CLOCK HANDS DO NOT START MOVING

(KNOB PUSHED TWO TIMES)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

PILOT CLOCK HANDS DO NOT START MOVING

(KNOB PUSHED THREE TIMES)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

PILOT CLOCK HOUR AND MINUTE HANDS

WILL NOT MOVE (KNOB PULLED AND

TURNED)

TM 1–1520–238–T–5 MISCELLANEOUS

INSTRUMENTS

PILOT COLL 1 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT COLL 2 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT COLL LVDT DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT COMM VHF FM CIRCUIT BREAKER –

DOES NOT STAY CLOSED (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

PILOT COMM VHF FM CIRCUIT BREAKER –

DOES NOT STAY CLOSED (ADI)

TM 11–1520–238–23–2 VHF AM–FM

AN/ARC–186 AND

VHF/FM

AN/ARC–201A RADIO

SETS (ADI)

PILOT CSC PANEL EDGE LIGHT DOES NOT

LIGHT (ACV) (PILOT EXT LT/INTR LT PANEL:

R/CTR CSL AND INST CONTROLS ROTATED

TO BRT)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

PILOT CYCLIC GRIP NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT DAP OR HDU NO–GO PILOT

COMPARTMENT APPEARS ON HOD

TM 9–1270–221–23 IHADSS

PILOT DAP OR HDU NO–GO PILOT

COMPARTMENT, CPG DAP OR HDU NO–GO

CPG COMPARTMENT AND DEU NO–GO RH

FAB APPEARS ON HOD

TM 9–1270–221–23 IHADSS
TM 1–1520–238–T–2

2–134

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT DIM/TEST PANEL EDGE–LIGHTING

DOES NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT DIM/TEST PANEL, FUEL QUANTITY AND

ENG OIL INDICATORS DO NOT LIGHT (PILOT

EXT LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT DIR 1 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT DIR 2 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT DIR LVDT NO–GO PLT COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT DISPENSER CONTROL PANEL EDGE

LIGHT DOES NOT LIGHT (PILOT EXT LT/INTR

LT PANEL: INST CONTROL ROTATED TO

BRT)

TM 9–1090–208–23–2 DISPENSER SYSTEM

– M92 TEST SET

PILOT EDGE–LIGHTS ARE NOT LIGHTED

(PILOT EXT LT/INTR LT PANEL: L CSL, R/CTR

CSL AND INST CONTROLS ROTATED TO

BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

PILOT ELEC PWR PANEL EDGE–LIGHTING

DOES NOT COME ON (PILOT EXT LT/INTR LT

PANEL: L CSL CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

PILOT ENG 1 FIRE PULL HANDLE DOES NOT

LIGHT (PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST SWITCH PRESSED)

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION

PILOT ENG 1 FIRE PULL HANDLE DOES NOT

STAY IN PULLED POSITION

TM 1–1520–238–T–8 FIRE

EXTINGUISHERS

PILOT ENG 2 FIRE PULL HANDLE DOES NOT

LIGHT (PILOT MASTER CAUTION/ WARNING

PANEL: PRESS TO TEST SWITCH PRESSED)

TM 1–1520–238–T–8 ENGINE 2 FIRE

DETECTION
TM 1–1520–238–T–2

2–135

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT ENG 2 FIRE PULL HANDLE DOES NOT

STAY IN PULLED POSITION

TM 1–1520–238–T–8 FIRE

EXTINGUISHERS

PILOT ENGINE CHOP INDICATOR DOES NOT

GO OUT (PILOT COLLECTIVE STICK: CHOP

COLLAR TURNED CLOCKWISE)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

PILOT ENGINE CHOP INDICATOR DOES NOT

LIGHT (PILOT COLLECTIVE STICK: CHOP

COLLAR TURNED FULL CLOCKWISE)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

PILOT ENGINE CHOP INDICATOR DOES NOT

LIGHT (PILOT COLLECTIVE STICK: CHOP

COLLAR TURNED FULL CLOCKWISE)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

PILOT ENGINE INSTRUMENTS SINGLE

VERTICAL DISPLAY LAMPS DO NOT LIGHT

FOR 3 SECONDS (PILOT DIM/TEST PANEL:

DGT OFF/NORM/TST SWITCH SET AND

HELD TO TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL INDICATOR DOES NOT

INDICATE ENGINE 1 OIL PRESSURE

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL INDICATOR DOES NOT

INDICATE ENGINE 2 OIL PRESSURE

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL INDICATOR DOES NOT

INDICATE FULL SCALE (PILOT DIM/ TEST

PANEL: DGT OFF/NORM/TST SWITCH HELD

AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL INDICATOR DOES NOT

INDICATE POSITIVE OIL PRESSURE WITHIN

30 SECONDS OF NG INCREASE (ENGINE 1

STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

PILOT ENG OIL INDICATOR EDGE– LIGHTING

DOES NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–136

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT ENG OIL INDICATOR VERTICAL DISPLAY

SCALES DO NOT INDICATE 0 PRESSURE

(PILOT DIM/TEST PANEL: DIM CONTROL

ROTATED TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL INDICATOR VERTICAL DISPLAY

SCALES HAVE EVERY OTHER LAMP NOT

LIGHTED (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL, TGT, TORQUE, FUEL

QUANTITY, ENG–RTR RPM% AND NG RPM%

VERTICAL SCALE INDICATORS DO NOT DIM

(PILOT DIM/TEST PANEL: PHOTOCELL

COVERED)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL, TGT, TORQUE, FUEL

QUANTITY, ENG–RTR RPM% AND NG RPM%

VERTICAL SCALE INDICATORS DO NOT

BRIGHTEN (PILOT DIM/TEST PANEL: LIGHT

SHINING ON PHOTOCELL)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL, TGT, TORQUE, FUEL

QUANTITY, ENG–RTR RPM%, AND NG RPM%

VERTICAL SCALE INDICATORS DO NOT DIM

(PILOT DIM/TEST PANEL: MANUAL DIM

CONTROL FULLY ROTATED

COUNTERCLOCKWISE)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG OIL, TGT, TORQUE, FUEL

QUANTITY, ENG–RTR RPM%, AND NG RPM%

VERTICAL SCALE INDICATORS DO NOT

BRIGHTEN (PILOT DIM/TEST PANEL:

MANUAL DIM CONTROL FULLY ROTATED

CLOCKWISE)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% INDICATOR DOES NOT

INDICATE ENGINE 1 NP (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% INDICATOR DOES NOT

INDICATE ENGINE 2 NP (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–137

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT ENG–RTR RPM% INDICATOR DOES NOT

INDICATE FULL SCALE (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH HELD

AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% INDICATOR DOES NOT

INDICATE NR (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% INDICATOR EDGE–

LIGHTING DOES NOT LIGHT (PILOT EXT

LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% INDICATOR VERTICAL

SCALE INDICATORS DO NOT INDICATE 0%

(PILOT DIM/TEST PANEL: DIM CONTROL

ROTATED TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% INDICATOR VERTICAL

SCALE INDICATORS HAVE EVERY OTHER

LAMP NOT LIGHTED (PILOT DIM/TEST

PANEL: DGT OFF/ NORM/TST SWITCH HELD

AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT ENG–RTR RPM% NP1, NP2 AND NR

INDICATORS DO NOT SHOW 100%

(ENGINES 1 AND 2 OPERATING)

TM 1–1520–238–T–4 TORQUE SHARING

SYSTEM

PILOT EXT LT/INTR LT EDGE–LIGHT PANEL IS

NOT LIGHTED (PILOT EXT LT/INTR LT

PANEL: L CSL CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 PILOT EDGE–LIGHTS

PILOT FCP EDGE LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: L CSL AND

R/CTR CSL CONTROLS ADJUSTED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT FIRE EXTINGUISHER PANEL

EDGE–LIGHT DOES NOT BRIGHTEN (PILOT

EXT LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–8 ENGINE 1 FIRE

DETECTION
TM 1–1520–238–T–2

2–138

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT FLIR VIDEO AND SYMBOLS DO NOT

APPEAR ON HOD (CPG FIRE CONTROL

PANEL: SIGHT SEL SWITCH SET TO TADS)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

PILOT FUEL LOW AFT INDICATOR IS NOT

LIGHTED

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL LOW AFT INDICATOR IS NOT

LIGHTED WITH PILOT FUEL QUANTITY

INDICATOR AFT VERTICAL DISPLAY

INDICATING 22 TO 26 LBS (CPG FUEL

PANEL: TRANS SWITCH SET TO FWD)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL LOW FWD INDICATOR IS LIGHTED TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL LOW FWD INDICATOR IS NOT

LIGHTED WITH PILOT FUEL QUANTITY

INDICATOR FWD VERTICAL DISPLAY

INDICATING 20 TO 16 LBS (PILOT FUEL

PANEL: TRANS SWITCH SET TO AFT)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL PANEL EDGE–LIGHTS DO NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: L CSL

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–7 FUEL CROSSFEED/

BOOST SYSTEM

PILOT FUEL QUANTITY INDICATOR AFT

VERTICAL DISPLAY DOES NOT INDICATE 19

TO 21 LBS (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH SET TO TST) (CPG

SELECTABLE DIGITAL DISPLAY: TEST

PUSHBUTTON PUSHED)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR AFT

VERTICAL DISPLAY DOES NOT INDICATE 29

TO 31 LBS (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH SET TO TST) (CPG

SELECTABLE DIGITAL DISPLAY: TEST

PUSHBUTTON PUSHED)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

Change 4 2–139

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT FUEL QUANTITY INDICATOR AFT

VERTICAL DISPLAY DOES NOT SHOW

DECREASE (CPG FUEL PANEL: TRANS

SWITCH SET TO FWD)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR AFT

VERTICAL DISPLAY DOES NOT INDICATE

DECREASE WITH ORIDE SWITCH SET TO

PLT AND PLT TRANS SWITCH SET TO AFT

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR FWD

VERTICAL DISPLAY DOES NOT INDICIATE

INCREASE WITH ORIDE SWITCH SET TO

CPG AND CPG TRANS SWITCH AT TO FWD

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR AFT

VERTICAL DISPLAY DOES NOT SHOW

INCREASE (PILOT FUEL PANEL: TRANS

SWITCH SET TO AFT)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR DOES NOT

INDICATE FULL SCALE OR SHOW ALL

DIGITAL 888 (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT FUEL QUANTITY INDICATOR DOES NOT

SHOW DIGITAL READOUTS (PILOT

DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT FUEL QUANTITY INDICATOR DIGITAL

READOUTS ARE NOT BLANKED (PILOT

DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH SET TO DGT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT FUEL QUANTITY INDICATOR

EDGE–LIGHTING DOES NOT LIGHT (PILOT

EXT LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT FUEL QUANTITY INDICATOR FWD

VERTICAL DISPLAY DOES NOT SHOW

DECREASE (PILOT FUEL PANEL: TRANS

SWITCH SET TO AFT)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER
TM 1–1520–238–T–2

2–140 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT FUEL QUANTITY INDICATOR FWD

VERTICAL DISPLAY DOES NOT SHOW

INCREASE (CPG FUEL PANEL: TRANS

SWITCH SET TO FWD)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR FWD

VERTICAL DISPLAY DOES NOT SHOW

INCREASE (CPG FUEL PANEL: TRANS

SWITCH SET TO FWD AND ORIDE SWITCH

SET TO CPG)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL QUANTITY INDICATOR VERTICAL

SCALE INDICATORS OR DIGITAL READOUT

DO NOT INDICATE EXISTING FUEL ±20 LBS

(PILOT DIM/ TEST PANEL: DIM CONTROL

ROTATED TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT FUEL TRANS CIRCUIT BREAKER DOES

NOT STAY CLOSED WITH PILOT TRANS

SWITCH SET TO FWD

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT FUEL XFER ADVISORY LIGHT IS NOT

LIGHTED (ADA)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT GLARESHIELD SECONDARY LIGHTS DO

NOT LIGHT (PILOT EXT LT/INTR LT PANEL:

FLOOD CONTROL ROTATED TO DIM THEN

TO BRT)

TM 1–1520–238–T–6 PILOT UTILITY AND

SECONDARY

LIGHTS

PILOT GREEN FUEL XFR INDICATOR IS NOT

LIGHTED WITH PILOT TRANS SWITCH SET

AT TO AFT (ADB)

TM 1–1520–238–T–7 FUEL QUANTITY

INDICATION/

TRANSFER

PILOT GUN INDICATOR LIGHTS OR GUN FAIL

REMAINS ON VDU (PILOT CYCLIC STICK:

TRIGGER PULLED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

PILOT GUN INDICATOR IS NOT LIGHTED (CPG

FIRE CONTROL PANEL: GUN SWITCH SET

TO FXD)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PILOT HDU IS BLANK (PILOT FC PANEL: VID

SEL SWITCH SET TO GRAY SC AND VID BRT

CONTROL ADJUSTED)

TM 9–1270–221–23 IHADSS

PILOT HELMET ELECTRONICS NO–GO

APPEARS ON HOD

TM 9–1270–221–23 IHADSS
TM 1–1520–238–T–2

Change 7 2–141

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT HIGH RPM ROTOR INDICATOR DOES

NOT LIGHT AT 104% NR (ACV) (IN FLIGHT

AUTOROTATION)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

PILOT HIGH RPM ROTOR INDICATOR DOES

NOT LIGHT AT 108% NR (ACW) (IN FLIGHT

AUTOROTATION)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

PILOT LAT 1 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT LAT 2 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT LAT LVDT NO–GO PLT COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT LEFT BRAKE IS NOT FIRM OR WHEEL

ASSEMBLY ROTATES (PRESSURE APPLIED)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

PILOT LEFT SSU NO–GO PILOT

COMPARTMENT APPEARS ON HOD

TM 9–1270–221–23 IHADSS

PILOT LONG 1 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT LONG 2 DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT LONG LVDT DCPLR NO–GO PLT

COMPARTMENT APPEARS ON HOD

TM 1–1520–238–T–7 DASE

PILOT LOW RPM ROTOR INDICATOR DOES

NOT LIGHT AT 93% OR LESS (ENGINES 1

AND 2 OPERATING) (PILOT ENG–RTR RPM%

INDICATOR: NP BETWEEN 80% TO 85%)

TM 1–1520–238–T–4 DRIVE SYSTEM

VIBRATION

PILOT LSR DET CIRCUIT BREAKER – DOES

NOT STAY CLOSED (ADP)

TM 11–1520–238–23–2 LASER DETECTING

SET AN/AVR–2A(V)1

(ADP)

PILOT MAGNETIC COMPASS LAMP DOES NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT MASTER CAUTION/WARNING

INDICATORS ARE LIGHTED (HELICOPTER

SAFED AND BATTERY CONNECTED)

TM 1–1520–238–T–6 BATTERY
TM 1–1520–238–T–2

2–142

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT MISSILE INDICATOR IS NOT LIGHTED

(CPG FIRE CONTROL PANEL: MISSILE

SWITCH SET TO OFF)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PILOT MISSILE, ROCKET AND GUN

INDICATORS ARE NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST SWITCH PRESSED) (SQUAT

SWITCH FIXTURE INSTALLED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT ND/NU SWITCH DOES NOT MOVE STAB

UP STAB AUTO AC (CB2) AND STAB AUTO

DC (CB3) CIRCUIT BREAKER OPEN

TM 1–1520–238–T–7 STABILATOR

PILOT ND/NU SWITCH DOES NOT MOVE STAB

DOWN STAB AUTO AC (CB2) AND STAB

AUTO DC (CB3) CIRCUIT BREAKER OPEN

TM 1–1520–238–T–7 STABILATOR

PILOT NG RPM% INDICATOR DIGITAL

READOUTS ARE NOT BLANKED OUT (PILOT

DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH SET TO DGT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT NG RPM% INDICATOR DOES NOT

INDICATE ENGINE 1 NG (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT NG RPM% INDICATOR DOES NOT

INDICATE ENGINE 2 NG (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT NG RPM% INDICATOR DOES NOT

INDICATE FULL SCALE OR SHOW ALL

DIGITAL 888 (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT NG RPM% INDICATOR DOES NOT SHOW

DIGITAL READOUT (PILOT DIM/TEST PANEL:

DGT OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT NG RPM% INDICATOR EDGE– LIGHTING

DOES NOT LIGHT (CPG INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT NG RPM% INDICATOR VERTICAL SCALE

INDICATORS HAVE EVERY OTHER LAMP

NOT LIGHTED (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

Change 7 2–143

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT NG RPM% INDICATOR VERTICAL SCALE

INDICATORS OR DIGITAL READOUTS DO

NOT INDICATE BETWEEN 0% AND 5%

(PILOT DIM/TEST PANEL: DIM CONTROL

ROTATED TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT POWER QUADRANT EDGE–LIGHT

PANEL DOES NOT LIGHT (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

PILOT PRI MUX INDICATOR IS NOT LIGHTED

AND FLASHING (CPG MASTER

CAUTION/WARNING PANEL: MASTER

CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PILOT RADIO CALL PLACARD EDGE LIGHT

DOES NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: R/CTR CSL AND INST CONTROLS

ROTATED TO BRT)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

PILOT RDR WARN CIRCUIT BREAKER – DOES

NOT STAY CLOSED

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN) AND RADAR

WARNING SYSTEM

AN/APR–39A(V)1

(ADO)

PILOT RIGHT BRAKE IS NOT FIRM OR WHEEL

ASSEMBLY ROTATES (PRESSURE APPLIED)

TM 1–1520–238–T–4 MAIN LANDING

GEAR

PILOT RIGHT SSU NO–GO PILOT

COMPARTMENT APPEARS ON HOD

TM 9–1270–221–23 IHADSS

PILOT ROCKET INDICATOR FLASHES OR

LIGHTS (PILOT CYCLIC STICK: R/G/M/C

SWITCH SET TO R ON)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PILOT ROCKET INDICATOR IS NOT LIGHTED

(CPG FIRE CONTROL PANEL: RKT SWITCH

SET TO GND STOW)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PILOT SAFE INDICATOR AND CPG ARM

INDICATOR DO NOT LIGHT (PILOT FCP:

MASTER SWITCH SET TO SAFE)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT SAFE INDICATOR LIGHTS (PILOT FCP:

MASTER SWITCH SET TO SAFE) (SQUAT

SWITCH FIXTURE INSTALLED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM
TM 1–1520–238–T–2

2–144 Change 7

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT SAFE INDICATORS DO NOT LIGHT

(PILOT FCP: MASTER SWITCH SET TO

SAFE) (SQUAT SWITCH FIXTURE

INSTALLED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT SAFE OR ARM INDICATOR LIGHTS (CPG

FCP: CPG PLT/GND SWITCH SET TO OFF

AND CPG SWITCH SET TO ARM) (SQUAT

SWITCH FIXTURE REMOVED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT SAFE OR ARM INDICATOR LIGHTS

(PILOT FCP: MASTER SWITCH SET TO SAFE

THEN ARM)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PILOT SAI EDGE–LIGHTING DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT SAI OFF FLAG NOT VISIBLE (PULL TO

CAGE KNOB PULLED AND ROTATED)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT STAB DEG/NOM SPD PLACARD PANEL

EDGE–LIGHT DOES NOT LIGHT

TM 1–1520–238–T–7 STABILATOR

PILOT STAB POS INDICATOR DOES NOT

INDICATE 25 ±2° WHEN PILOT COLLECTIVE

STICK: RESET PUSHBUTTON PRESSED

TM 1–1520–238–T–7 STABILATOR

PILOT STAB POS INDICATOR EDGE–LIGHT

DOES NOT LIGHT

TM 1–1520–238–T–7 STABILATOR

PILOT TADS INDICATOR IS NOT LIGHTED (CPG

FIRE CONTROL PANEL: TADS SWITCH SET

TO TADS)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PILOT TEMP INT INDICATOR IS LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

PILOT TEMP INT INDICATOR LIGHTS (ENGINES

1 AND 2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

PILOT TEMP TR INDICATOR IS LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS
TM 1–1520–238–T–2

2–145

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT TGT INDICATOR DIGITAL READOUTS

ARE NOT BLANKED OUT (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH SET

TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR DOES NOT INDICATE

ENGINE 1 TGT (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR DOES NOT INDICATE

ENGINE 2 TGT (ENGINES 1 AND 2

OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR DOES NOT INDICATE

FULL SCALE OR SHOW DIGITAL 888 (PILOT

DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR DOES NOT SHOW

DIGITAL READOUTS (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH HELD

AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR EDGE–LIGHTING DOES

NOT LIGHT (PILOT EXT LT/INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR VERTICAL DISPLAY

SCALE INDICATORS HAVE EVERY OTHER

LAMP NOT LIGHTED (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH HELD

AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT INDICATOR VERTICAL DISPLAY

SCALE OR DIGITAL READOUTS DO NOT

INDICATE AMBIENT TEMPERATURE (±5°)

(PILOT DIM/TEST PANEL: DIM CONTROL

ROTATED TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TGT, TORQUE, FUEL QUANTITY, AND NG

RPM% INDICATOR DIGITAL READOUTS ARE

NOT BLANKED OUT (PILOT DIM/TEST

PANEL: DGT OFF/ NORM/TST SWITCH SET

TO DGT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–146

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT TGT, TORQUE, FUEL QUANTITY AND NG

RPM% INDICATOR DIGITAL READOUTS ARE

NOT BLANKED OUT (PILOT DIM/TEST

PANEL: DGT OFF/ NORM/TST SWITCH SET

TO NORM AND DIM CONTROL ROTATED TO

MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR DOES NOT

INDICATE ENGINE 1 TORQUE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR DOES NOT

INDICATE ENGINE 2 TORQUE (ENGINES 1

AND 2 OPERATING)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR DIGITAL

READOUTS ARE NOT BLANKED (PILOT

DIM/TEST PANEL: DGT OFF/NORM/TST

SWITCH SET TO OFF)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR DOES NOT

INDICATE FULL SCALE OR SHOW ALL

DIGITAL 888 (PILOT DIM/TEST PANEL: DGT

OFF/NORM/TST SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR DOES NOT SHOW

DIGITAL READOUTS (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH HELD

AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR EDGE– LIGHTING

DOES NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE INDICATOR VERTICAL

DISPLAY SCALE INDICATORS HAVE EVERY

OTHER LAMP NOT LIGHTED (PILOT

DIM/TEST PANEL: DGT OFF/ NORM/TST

SWITCH HELD AT TST)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS
TM 1–1520–238–T–2

2–147

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT TORQUE INDICATOR VERTICAL

DISPLAY SCALE INDICATORS OR DIGITAL

READOUTS DO NOT INDICATE BETWEEN

0% AND 2% (PILOT DIM/TEST PANEL: DIM

CONTROL ROTATED TO MIDPOSITION)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TORQUE, TGT, NG RPM% AND ENG–RTR

RPM% INDICATORS DO NOT LIGHT (PILOT

EXT LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

PILOT TRANSMIT AUDIO IS NOT PRESENT IN

BOTH HEADSETS (PILOT TRANSMITTING)

(RADIO REMOTELY SELECTED)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

PILOT UTILITY LIGHT DOES NOT LIGHT

(RHEOSTAT ROTATED TO BRT)

TM 1–1520–238–T–6 PILOT UTILITY AND

SECONDARY

LIGHTS

PILOT VHF DOES NOT TUNE TO PROPER

PRESET CHANNEL (PILOT VHF AM–FM:

FREQUENCY SELECT SWITCH TO PRE)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

PILOT VHF RADIO TRANSMIT POWER IS

REPORTED TO BE WEAK (PILOT CYCLIC

STICK: RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

PILOT VHF RECEIVE AUDIO IS NOT PRESENT

IN CPG HEADSET (PILOT CYCLIC STICK:

RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

PILOT VHF RECEIVE AUDIO IS NOT PRESENT

IN EITHER HEADSET (PILOT CYCLIC STICK:

RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

PILOT VHF RECEIVE AUDIO IS NOT PRESENT

IN PILOT HEADSET (PILOT CYCLIC STICK:

RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET
TM 1–1520–238–T–2

2–148

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PILOT VIDEO AND SYMBOLS ARE NOT

DISPLAYED (CPG FIRE CONTROL PANEL:

SIGHT SEL SWITCH SET TO TADS)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

PILOT VIDEO AND SYMBOLS ARE NOT

DISPLAYED (VDU: MODE SWITCH SET TO

PLT)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

PILOT VIDEO APPEARS ON VDU DISPLAY BUT

IS DISTORTED OR WRONG (VDU: MODE

SWITCH SET TO PLT)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

PILOT VIDEO DOES NOT APPEAR ON VDU

DISPLAY (VDU: MODE SWITCH SET TO PLT)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

PILOT VIDEO IS NOT PLAYED BACK (CPG

VIDEO RECORDER: PLAY SWITCH SET TO

FWD AND MODE SWITCH SET TO PLAY)

TM 11–1520–238–23–2 VIDEO RECORDER

PILOT VSI DOES NOT ADJUST 0 FPM TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT VSI EDGE–LIGHTING DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 FLIGHT

INSTRUMENTS

PILOT WINDSHIELD WIPER DOES NOT

OPERATE AT HIGH SPEED (PILOT ANTI ICE

PANEL: WSHLD WIPER SWITCH SET TO

HIGH)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

PILOT WINDSHIELD WIPER DOES NOT

OPERATE AT LOW SPEED (PILOT ANTI ICE

PANEL: WSHLD WIPER SWITCH SET TO

LOW)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

PITCH, ROLL, YAW AND ATTD/HOVER HOLD

SWITCHES REMAIN ON (CPG CYCLIC STICK:

ASE RELEASE SWITCH PRESSED)

TM 1–1520–238–T–7 DASE

PITCH, ROLL, YAW AND ATTD/HOVER HOLD

SWITCHES REMAIN ON (PILOT CYCLIC

STICK: ASE RELEASE SWITCH PRESSED)

TM 1–1520–238–T–7 DASE
TM 1–1520–238–T–2

2–149

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PITCH SWITCH DOES NOT STAY ON AND ASE

INDICATOR IS LIGHTED (PILOT ASE PANEL:

PITCH SWITCH SET TO PITCH)

TM 1–1520–238–T–7 DASE

PITOT HTR CIRCUIT BREAKER (CB36) DOES

NOT STAY CLOSED (PILOT ANTI ICE PANEL:

PITOT ICE DET AD SNSR SWITCH SET TO

ON)

TM 1–1520–238–T–8 PITOT ANTI–ICE

PITOT HTR CIRCUIT BREAKER (CB36) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

PITOT TUBE (LT WING) HEATER DOES NOT

HEAT (PILOT ANTI ICE PANEL: PITOT ICE

DET AD SNSR SWITCH SET TO ON)

TM 1–1520–238–T–8 PITOT ANTI–ICE

PITOT TUBE (RT WING) HEATER DOES NOT

HEAT (PILOT ANTI ICE PANEL: PITOT ICE

DET AD SNSR SWITCH SET TO ON)

TM 1–1520–238–T–8 PITOT ANTI–ICE

PLAIN INDICATOR (RED) DOES NOT LIGHT

(CIPHONY PANEL: MODE SWITCH SET TO

PLAIN)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

PLAIN INDICATOR (RED) REMAINS LIGHTED

(CIPHONY PANEL: MODE SWITCH SET TO

CIPHER)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

PMSL MESSAGE DOES NOT APPEAR ON HOD

(PILOT CYCLIC STICK: R/G/M/C SWITCH SET

TO M)

TM 9–1427–475–20 HME SYSTEM

PNVS (FLIR) DIRECT VIDEO DOES NOT

APPEAR ON HOD

TM 9–1270–221–23 IHADSS

PNVS SHROUD WINDOW HEATER DOES NOT

COOL (PILOT FIRE CONTROL PANEL: PNVS

SWITCH SET TO OFF AND PILOT ANTI ICE

PANEL: TADS/PNVS SWITCH SET TO OFF)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE
TM 1–1520–238–T–2

2–150

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PNVS SHROUD WINDOW HEATER DOES NOT

HEAT (PILOT FIRE CONTROL PANEL: PNVS

SWITCH SET TO ON AND PILOT ANTI ICE

PANEL: TADS/PNVS SWITCH SET TO

GROUND)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

PNVS SHROUD WINDOW HEATER DOES NOT

HEAT (PILOT FIRE CONTROL PANEL: PNVS

SWITCH SET TO ON AND PILOT ANTI ICE

PANEL: TADS/PNVS SWITCH SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

POWER BATT CHGR AC CIRCUIT BREAKER

(CB86) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)

POWER BATT CHGR AC CIRCUIT BREAKER

DOES NOT STAY CLOSED (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 11–1520–238–23–2 BATTERY CHARGER

POWER BATT CHGR DC CIRCUIT BREAKER

(CB5) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

PILOT STATION)

POWER BATT CHGR DC CIRCUIT BREAKER

DOES NOT STAY CLOSED (EXTERNAL

ELECTRICAL POWER APPLIED)

TM 11–1520–238–23–2 BATTERY CHARGER

POWER ENG 1 CIRCUIT BREAKER (CB62)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

POWER ENG 2 CIRCUIT BREAKER (CB44)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

PILOT STATION)
TM 1–1520–238–T–2

Change 5 2–151

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

POWER ON INDICATOR (AMBER) DOES NOT

LIGHT (CIPHONY PANEL: POWER SWITCH

SET TO ON)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

POWER UP DISPLAY, NAV TOP LEVEL POWER

OFF PAGE IS NOT DISPLAYED (AN/ASN–137)

(ADC)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADC)

POWER XFMR RECT 1 CIRCUIT BREAKER

(CB1) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO BATT)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

POWER XFMR RECT 2 CIRCUIT BREAKER

(CB4) DOES NOT STAY CLOSED (PILOT

ELEC PWR PANEL: BATT/EXT PWR SWITCH

SET TO BATT)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

PPOS DATA DOES NOT CHANGE TO LINE 1

PPOS 12S WN 0000 0000, LINE 2 VAR E010.0

SPH CL6 (CDU: PPOS, VAR AND SPH DATA

ENTERED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

PPOS DOES NOT CHANGE TO UPDT (CDU

DOPPLER NAV: VAB NEXT TO DISPLAYED

WORD PPOS PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

PPOS EASTING DATA (RIGHT MOST 4 DIGITS

OF DISPLAY LINE 1) DO NOT START

INCREASING (CDU: NUMBER 150 ENTERED

ON SCRATCH PAD AND VAB NEXT TO

DISPLAYED WORD KPH PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

PRESS TO TEST INDICATOR IS NOT LIGHTED

(CPG INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PRESS TO TEST INDICATOR IS NOT LIGHTED

(PILOT EXT LT/INTR LT PANEL: INST

CONTROL ROTATED TO BRT) (CPG MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–152

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PRESSURE FUEL MANIFOLD COVER (R180)

DOES NOT STAY ON MANIFOLD

(REFUELING COMPLETED)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

PRESSURE FUEL MANIFOLD LEAKS (DURING

REFUELING)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

PRF AUDIO DOES NOT DOUBLE (RADAR

WARNING CONTROL UNIT: DSCRM SWITCH

SET TO ON AND SELF TEST SWITCH

ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

PRF AUDIO IS NOT HEARD IMMEDIATELY IN

EITHER HEADSET (RADAR WARNING

CONTROL UNIT: DSCRM SWITCH SET TO

ON AND SELF TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

PRF AUDIO IS NOT PRESENT WITHIN 4

SECONDS (RADAR WARNING CONTROL

UNIT: DSCRM SWITCH SET TO ON AND

SELF TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

PRI DISCH INDICATOR IS NOT LIGHTED (PILOT

APU FIRE TEST PANEL: FIRE TEST DET

SELECTOR SET TO 1)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

PRI DISCH INDICATOR IS NOT LIGHTED (PILOT

MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

PRI HYD INDICATOR DOES NOT INDICATE 3000

PSI (APU OPERATING)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

PRI HYD INDICATOR DOES NOT INDICATE 3000

PSI (EXTERNAL PRIMARY HYDRAULIC

POWER APPLIED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

PRI HYD INDICATOR IS LIGHTED (CPG

CIRCUIT BREAKER PANEL 1: EMERG BATT

CAUT CIRCUIT BREAKER CLOSED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM
TM 1–1520–238–T–2

2–153

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PRI HYD PSI INDICATOR IS LIGHTED

(EXTERNAL PRIMARY HYDRAULIC POWER

APPLIED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

PRI HYD PSI INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

PRI HYD PSI, UTIL HYD PSI AND SHAFT

DRIVEN COMP INDICATORS ARE NOT

LIGHTED (APU OPERATING) (PILOT APU

FIRE TEST PANEL: 95%/NORM SWITCH SET

TO 95%)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

PRI HYD PSI, UTIL HYD PSI AND SHAFT

DRIVEN COMP INDICATORS ARE NOT

LIGHTED (APU OPERATING) (PILOT APU

FIRE TEST PANEL: 95%/NORM SWITCH SET

TO NORM)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

PRI LT CIRCUIT BREAKER (CB14) DOES NOT

STAY CLOSED (EXTERNAL ELECTRICAL

POWER APPLIED)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 2 –

CPG STATION)

PRI LT CIRCUIT BREAKER (CB14) DOES NOT

STAY CLOSED (PILOT EXT LT/INTR LT

PANEL: INST CONTROL ROTATED FROM

OFF TO BRT)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

PRI MUX INDICATOR IS NOT LIGHTED (CPG

CIRCUIT BREAKER PANEL NO 1: FC FCC DC

CIRCUIT BREAKER OPENED) (CPG FIRE

CONTROL PANEL: MUX SWITCH SET TO

SEC)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PRI MUX INDICATOR IS NOT LIGHTED AND

FLASHING (CPG CIRCUIT BREAKER PANEL

1: FC FCC DC CIRCUIT BREAKER OPENED)

(CPG FIRE CONTROL PANEL: MUX SWITCH

SET TO SEC)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM
TM 1–1520–238–T–2

2–154

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PRI MUX INDICATOR FLASHING (CPG MASTER

CAUTION/WARNING PANEL: MASTER

CAUTION INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

PWR ON INDICATOR AND PRI MUX INDICATOR

ON CPG CAUTION/WARNING PANEL LIGHT

(CPG FCP: MUX SWITCH SET TO PRI AND

FCC/MUX SWITCH SET TO ON)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PWR ON LIGHT ON FCC DOES NOT LIGHT

(CPG FCP: MUX PRI AND FCC/MUX

SWITCHES SET TO ON)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

PYLN ACTUATOR CONTROLLER NO–GO’S LT

INBD AND LT OUTBD APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLN ACTUATOR CONTROLLER NO–GO’S LT

INBD APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLN ACTUATOR CONTROLLER NO–GO’S LT

OUTBD APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLN ACTUATOR CONTROLLER NO–GO’S RT

INBD APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLN ACTUATOR CONTROLLER NO–GO’S RT

INBD AND RT OUTBD APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLN ACTUATOR CONTROLLER NO–GO’S RT

OUTBD APPEARS ON HOD

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLON ACTUATORS AND ROCKET STEERING

CURSOR DO NOT TRACK IN MANUAL

CONTROL (ORT: MAN TRK ACTIONED)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLON ACTUATORS DO NOT FOLLOW TADS

TURRET (ORT: SLAVE BUTTON PRESSED

AND MAN TRK ACTIONED)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLON ACTUATORS DO NOT GO TO FLIGHT

STOW (CPG FCP: RKT SWITCH SET TO

NORM)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM
TM 1–1520–238–T–2

2–155

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PYLON ACTUATORS DO NOT MOVE (PYLN

ACTG SWITCH ACTIONED)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLON FIRING CONTACT PIN LENGTH IS NOT

BETWEEN 0.025 AND 0.065 INCH ON FACE

OF TEST SET (PYLON EXTERNAL STORES

EJECTOR TEST SET INSTALLED)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

PYLONS DO NOT GO TO FIRING POSITION

(CPG CYCLIC STICK: R/G/M/C SWITCH SET

TO R ON)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FIRING POSITION

(ORT: RKT/GUN/MSL SWITCH SET TO RKT)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FIRING POSITION

(PILOT CYCLIC STICK: R/G/M/C SWITCH SET

TO R ON)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FLIGHT STOW (CPG

CYCLIC STICK: R/G/M/C SWITCH SET TO R

OFF)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FLIGHT STOW (CPG

FCP: CPG SWITCH SET TO OFF AND RKT

SWITCH SET TO OFF)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FLIGHT STOW (PILOT

AND CPG FC PANELS: RKT SWITCH SET TO

OFF) (SQUAT SWITCH FIXTURE INSTALLED)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FLIGHT STOW (PILOT

CYCLIC STICK: R/G/M/C SWITCH SET TO R

OFF)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FLIGHT STOW (PILOT

FC PANEL: RKT SWITCH SET TO NORM)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO FLIGHT STOW (PILOT

FCP: MASTER ARM SWITCH SET TO ARM

AND RKT SWITCH SET TO OFF)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM
TM 1–1520–238–T–2

2–156

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

PYLONS DO NOT GO TO GROUND STOW (CPG

FCP: CPG SWITCH SET TO ARM AND RKT

SWITCH SET TO GND STOW)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO GROUND STOW

(PILOT FCP: RKT SWITCH SET TO GND

STOW)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

PYLONS DO NOT GO TO GROUND STOW (ORT

LH GRIP: RKT/GUN/MSL SWITCH SET TO

OFF AND CPG FC PANEL: RKT SWITCH SET

TO OFF)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT GO TO GROUND STOW

(SQUAT SWITCH FIXTURE REMOVED)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT REMAIN IN GROUND STOW

(CPG CYCLIC STICK: R/G/M/C SWITCH SET

TO R)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT REMAIN IN GROUND STOW

(ORT: RKT/GUN/MSL SWITCH SET TO RKT)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT REMAIN IN GROUND STOW

(PILOT CYCLIC STICK: R/G/M/C SWITCH SET

TO R)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

PYLONS DO NOT RETURN TO GROUND STOW

(CPG FCP: RKT SWITCH SET TO GND

STOW)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

QTY REM AND ZONE SEL INDICATORS DO

NOT LIGHT (MASTER CAUTION/ WARNING

PANELS: PRESS TO TEST INDICATOR

PRESSED)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

QTY REM AND ZONE SEL INDICATORS ARE

NOT LIGHTED (PILOT MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

RADAR JAMMER RECEIVER/TRANSMITTER

COOLING FAN IS NOT HEARD (RDRCM

CONTROL UNIT: OFF/STBY/OPR SWITCH

SET TO OPR)

TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136
TM 1–1520–238–T–2

Change 7 2–156.1

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RADAR WARNING CONTROL PANEL

EDGE-LIGHT IS NOT LIGHTED (PILOT EXT

LT/INTR LT PANEL: R/CTR CSL SWITCH

ROTATED TO BRT)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

RADAR WARNING CONTROL PANEL

EDGE-LIGHT – IS NOT LIGHTED

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN) AND RADAR

WARNING SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING CONTROL PANEL – NO

SELF-TEST AUDIO AND NO DISPLAY WHEN

TEST BUTTON IS PRESSED (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING CONTROL PANEL –

SYNTHETIC VOICE MESSAGE DISTORTED

OR GARBLED (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING CONTROL PANEL – NO

SYNTHETIC VOICE MESSAGE DURING

SELF-TEST OR NORMAL OPERATION,

DISPLAY IS LIGHTED (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING CONTROL PANEL –

SYNTHETIC VOICE MODE INOPERATIVE

(ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY (DSCRM ON MODE)

– SHOWS ABNORMAL INDICATION (ADN)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

RADAR WARNING DISPLAY (DSCRM ON MODE)

– SHOWS NO INDICATION (ADN)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

RADAR WARNING DISPLAY IS NOT BLANKED

DURING IFF TRANSMISSION (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

2–156.2 Change 7

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RADAR WARNING DISPLAY IS NOT BLANKED

DURING IFF TRANSMISSION (PILOT IFF

TRANSPONDER CONTROL PANEL: MODE 1,

2, AND 3/A TESTS PERFORMED)

TM 11–1520–238–23–2 IFF SYSTEM

RADAR WARNING DISPLAY – FALSE WARNING

SIGNALS DURING IFF INTERROGATION

(ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY – FLASHING BOX

AROUND CENTER OF DISPLAY (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY – KNOWN

EMITTERS DISPLAYED AT INCORRECT

BEARINGS (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY – NOT LIGHTED,

SYNTHETIC VOICE PRESENT (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY, ONE STROBE

DOES NOT APPEAR AT 12 O’CLOCK AND

ONE STROBE AT 6 O’CLOCK WITHIN 4

SECONDS (RADAR WARNING CONTROL

UNIT: DSCRM SWITCH SET TO ON AND

SELF TEST SWITCH ACTIONED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

RADAR WARNING DISPLAY SHOWS MORE

THAN FORWARD AND AFT STROBES OR

PARTIAL STROBES (RADAR WARNING

CONTROL PANEL: DSCRM SWITCH SET TO

ON AND SELF TEST KEY PRESSED)(ADN)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

RADAR WARNING DISPLAY SHOWS NO

INDICATION (RADAR WARNING CONTROL

PANEL: DSCRM SWITCH SET TO ON AND

SELF TEST KEY PRESSED)(ADN)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

RADAR WARNING DISPLAY – TWO TRIANGLES

AT EITHER TOP OR BOTTOM OF DISPLAY

WITH SYMBOL FLASHING IN MORE THAN

ONE QUADRANT (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)
TM 1–1520–238–T–2

Change 7 2–157

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RADAR WARNING DISPLAY – TWO TRIANGLES

AT EITHER TOP OR BOTTOM OF DISPLAY

WITH SYMBOL FLASHING IN ONE

QUADRANT (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY – NO SYMBOL

DISPLAYED WHEN RADIATED BY RADAR

SIGNAL SIMULATOR (ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY – SOLID 4 INSIDE

FLASHING BOX IN THE CENTER OF THE

DISPLAY DOES NOT APPEAR WHEN

RADIATED BY RADAR SIGNAL SIMULATOR

(ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING DISPLAY – SYMBOL

DISPLAYED IN OPPOSITE QUADRANT WHEN

RADIATED BY RADAR SIGNAL SIMULATOR

(ADO)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39A(V)1

(ADO)

RADAR WARNING TONE IS NOT HEARD IN

HEADSET AFTER 6 SECONDS (RADAR

WARNING CONTROL PANEL: DSCRM

SWITCH SET TO ON AND SELF TEST KEY

PRESSED) (ADN)

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN)

RAI AND RMI OFF FLAGS DO NOT COME INTO

VIEW OR RETURN TO UNMARKED

POSITION (HARS PANEL: ALIGN SWITCH

SET TO OFF THEN TO FAST)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS
TM 1–1520–238–T–2

2–158 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RAI DOES NOT DISPLAY CORRECT PITCH (RAI:

PITCH TRIM CONTROL ADJUSTED)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RAI DOES NOT DISPLAY CORRECT ROLL (RAI:

PITCH TRIM CONTROL ADJUSTED)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RAI DOES NOT INDICATE LEFT AND RIGHT

ROLLS

TM 11–1520–238–23–2 HARS

RAI DOES NOT INDICATE PITCH UP AND PITCH

DOWN

TM 11–1520–238–23–2 HARS

RAI EDGE LIGHT DOES NOT LIGHT (CPG INTR

LT PANEL: INST CONTROL ROTATED TO

BRT)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RAI HEADING OFF WARNING FLAG IS NOT IN

VIEW

TM 11–1520–238–23–2 HARS

RANGE DATA IS NOT DISPLAYED ON HOD

(DEK: DATA ENTRY SWITCH SET TO RNG)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

RASTER DOES NOT APPEAR ON VDU (VDU:

MODE SWITCH SET TO TEST AND BRT

CONTROLS ADJUSTED)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

RASTER IS VISIBLE BUT TEST PATTERN DOES

NOT APPEAR (VDU: MODE SWITCH SET TO

TEST, BRT AND CTRS CONTROLS

ADJUSTED)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

RATE GYRO 1 NO–GO LH AFT CATWALK

APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

RATE GYRO 2 NO–GO RH AFT CATWALK

APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

RCVR–XMTR ASSY NO–GO BELLY –

MEASSAGE DISPLAYED (ADD)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

RDR ALT CIRCUIT BREAKER (CB31) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

RDR JAM CAUTION INDICATOR IS LIGHTED TM 11–1520–238–23–2 RADAR JAMMER

SYSTEM

AN/ALQ–136
TM 1–1520–238–T–2

Change 7 2–159

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RDR JAM CAUTION INDICATOR IS NOT

LIGHTED (PILOT FORWARD CIRCUIT

BREAKER PANEL: MISSION RDR JAM DC

CIRCUIT BREAKER OPENED)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RDR WARN CIRCUIT BREAKER (CB53) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

RDR WARN CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 11–1520–238–23–2 RADAR WARNING

SYSTEM

AN/APR–39(V)1

(ADN) AND RADAR

WARNING SYSTEM

AN/APR–39A(V)1

(ADO)

RECEIVE AUDIO IS NOT PRESENT IN CPG

HEADSET (PILOT CYCLIC STICK: RADIO/ICS

SWITCH SET TO RADIO)

TM 11–1520–238–23–2 UHF–AM RADIO SET

RECEIVE AUDIO IS NOT PRESENT IN EITHER

HEADSET (PILOT CYCLIC STICK: RADIO/ICS

SWITCH SET TO RADIO)

TM 11–1520–238–23–2 UHF–AM RADIO SET

RECEIVE AUDIO IS NOT PRESENT IN PILOT

HEADSET (PILOT CYCLIC STICK: RADIO/ICS

SWITCH SET TO RADIO)

TM 11–1520–238–23–2 UHF–AM RADIO SET

RECORDED CPG VIDEO IS FUZZY OR GRAINY

(VIDEO RECORDER CONTROL PANEL: PLAY

SWITCH SET TO FWD AND MODE SWITCH

SET TO PLAY)

TM 11–1520–238–23–2 VIDEO RECORDER

RECORDER CANNOT BE CONTROLLED BY

CPG CONTROL PANEL (VIDEO RECORDER

CONTROL PANEL: PLAY SWITCH SET TO

EACH POSITION AND MODE SWITCH SET

TO PLAY)

TM 11–1520–238–23–2 VIDEO RECORDER

RECORDER DOES NOT RESUME OPERATION

(VIDEO RECORDER CONTROL PANEL:

MODE SWITCH SET TO STBY THEN PLAY)

TM 11–1520–238–23–2 VIDEO RECORDER
TM 1–1520–238–T–2

2–160

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RECT 1 INDICATOR DOES NOT LIGHT (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

RECT 1 INDICATOR IS LIGHTED (APU

OPERATING) (PILOT ELEC PWR PANEL: GEN

1 SWITCH SET TO OFF/RESET)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

RECT 1 INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: GEN 1 SWITCH SET TO GEN 1)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

RECT 2 INDICATOR DOES NOT LIGHT (PILOT

MASTER CAUTION/WARNING PANEL: PRESS

TO TEST INDICATOR PRESSED)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

RECT 2 INDICATOR IS LIGHTED (APU

OPERATING) (PILOT ELEC PWR PANEL: GEN

1 SWITCH SET TO GEN 1 AND GEN 2

SWITCH SET TO OFF/RESET)

TM 1–1520–238–T–6 AC ELECTRICAL

POWER

GENERATION

RECT 2 INDICATOR IS LIGHTED (PILOT ELEC

PWR PANEL: GEN 2 SWITCH SET TO GEN 2)

TM 1–1520–238–T–6 DC ELECTRICAL

POWER

GENERATION

RED REJECT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: ANT SWITCH SET TO BOT AND TEST

SET ALIGNED TO TOP ANTENNA)

(AN/APM–424 TRANSPONDER TEST SET:

SEQ SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

RED REJECT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: ANT SWITCH SET TO TOP AND TEST

SET ALIGNED TO BOTTOM ANTENNA)

(AN/APM–424 TRANSPONDER TEST SET:

SEQ SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

Change 6 2–161

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RED REJECT INDICATOR ON AN/APM–424

TRANSPONDER TEST SET DOES NOT

LIGHTS ON MODE 1, 2,OR 3/A (SEQ SWITCH

PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

REFUELING PANEL IS LIGHTED (REFUEL

VALVE SWITCH SET TO CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

REFUEL VALVE INDICATOR IS LIGHTED

(REFUELING PANEL: REFUEL VALVE

SWITCH SET TO CLOSED)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR IS NOT

LIGHTED (REFUELING PANEL: REFUEL

VALVE SWITCH SET TO OPEN)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON PILOT

CAUTION/WARNING PANEL IS LIGHTED

(REFUELING PANEL: REFUEL VALVE

SWITCH SET TO CLOSE)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON PILOT

CAUTION/WARNING PANEL IS LIGHTED

(REFUELING PANEL: REFUEL VALVE

SWITCH SET TO CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON PILOT

CAUTION/WARNING PANEL IS NOT LIGHTED

(REFUEL PANEL: REFUEL VALVE SWITCH

SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON

REFUELING PANEL IS NOT LIGHTED

(REFUELING PANEL: REFUEL VALVE

SWITCH SET TO OPEN)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON

REFUELING PANEL IS NOT LIGHTED

(REFUELING PANEL: REFUEL VALVE

SWITCH SET TO OPEN)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON

REFUELING PANEL IS LIGHTED (REFUELING

PANEL: REFUEL VALVE SWITCH SET TO

CLOSE)

TM 1–1520–238–T–7 GRAVITY

REFUELING/

DEFUELING

REFUEL VALVE OPEN INDICATOR ON

REFUELING PANEL IS LIGHTED (REFUELING

PANEL: REFUEL VALVE SWITCH SET TO

CLOSE)

TM 1–1520–238–T–7 PRESSURE

REFUELING/

DEFUELING
TM 1–1520–238–T–2

2–162 Change 6

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

REJECT INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: RAD TEST SWITCH SET TO OUT)

TM 11–1520–238–23–2 IFF SYSTEM

REMOTE ATTITUDE INDICATOR (RAI) OFF

WARNING FLAG IS IN VIEW (HARS VALID

STATUS)

TM 11–1520–238–23–2 HARS

REMOTE HELLFIRE ELECT NO–GO RH FAB

APPEARS ON HOD (PRI BUS DETACHED)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

REMOTE TRANSMITTER SELECTOR

INDICATOR PANEL – DOES NOT LIGHT

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

REMOTE TRANSMITTER SELECTOR

INDICATOR PANEL EDGE LIGHT DOES NOT

LIGHT (PILOT EXT LT/INTR LT PANEL: R/CTR

CSL AND INST CONTROLS ROTATED TO

BRT)

TM 11–1520–238–23–2 INTER–

COMMUNICATION

SYSTEM (ICS)

RES DISCH INDICATOR IS NOT LIGHTED

(PILOT MASTER CAUTION/WARNING PANEL:

PRESS TO TEST INDICATOR PRESSED)

 TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

RHE – LT BUS NO–GO RH FAB APPEARS ON

HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

RHE – RT BUS NO–GO RH FAB APPEARS ON

HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

RHI DIAL POINTER AND DIGITAL READOUT DO

NOT INDICATE 1000 FEET (HI SET SWITCH

PRESSED AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RHI DIAL POINTER DOES NOT INDICATE

CORRECT ALTITUDE AND OFF FLAG IS

VISIBLE (HI SET INDEX SET TO 800 FEET)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RHI DIAL POINTER DOES NOT MOVE (HI SET

SWITCH PRESSED AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RHI DIGITAL AND WARNING LIGHTING IS NOT

PRESENT (RHI: HI SET SWITCH PRESSED

AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RHI DIGITAL DISPLAY DOES NOT INDICATE

ALTITUDE, LO LAMP IS ON (RHI: HI SET

INDEX SET TO 800 FEET)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET
TM 1–1520–238–T–2

2–163

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RHI DOES NOT RETURN TO NORMAL

INDICATION (RHI: HI SET SWITCH PRESSED

AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RHI EDGE LIGHT IS NOT LIGHTED (HI SET

SWITCH PRESSED AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RHI OFF FLAG IS VISIBLE AND DIAL POINTER

INDICATES 0 FEET (HI SET INDEX SET TO

800 FEET)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

RIGHT DIRECTIONAL PEDAL DOES NOT

REMAIN IN POSITION (PILOT CYCLIC STICK:

FORCE TRIM SWITCH PRESSURE

REMOVED FROM FORCE TRIM REL

POSITION)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIGHT FAB NORMAL FAN IS NOT OPERATING

(PILOT ECS PANEL: STBY FAN SWITCH SET

TO NORM)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

RIGHT FAB STANDBY FAN IS NOT OPERATING

(CPG AUX/ANTI–ICE PANEL: STBY FAN

SWITCH SET TO STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

RIGHT FAB STANDBY FAN IS NOT OPERATING

(PILOT ECS PANEL: STBY FAN SWITCH SET

TO STBY FAN)

TM 1–1520–238–T–8 ENVIRONMENTAL

CONTROL SYSTEM

RIGHT FORMATION LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: FORM

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 FORMATION LIGHT

RIGHT INBOARD AND RIGHT OUTBOARD

PYLON ACTUATORS DO NOT RETURN TO

GROUND STOW (PYLON ACTG SWITCH SET

TO DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

RIGHT INBOARD PYLON ACTUATOR DOES

NOT GO TO FLIGHT STOW (PYLON ACTG

SWITCH SET TO UP)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

RIGHT INBOARD PYLON ACTUATOR DOES

NOT RETURN TO GROUND STOW (PYLON

ACTG SWITCH SET TO DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM
TM 1–1520–238–T–2

2–164

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RIGHT INBOARD PYLON DOES NOT MOVE

(PYLON ACTG SWITCH SET TO UP THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

RIGHT MAIN WHEEL DOES NOT ROTATE

FREELY

TM 1–1520–238–T–4 MAIN LANDING

GEAR

RIGHT MAIN WHEEL LOOSE TM 1–1520–238–T–4 MAIN LANDING

GEAR

RIGHT NAVIGATION LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: NAV SWITCH

SET TO DIM OR BRT)

TM 1–1520–238–T–6 NAVIGATION LIGHTS

RIGHT OUTBOARD PYLON ACTUATOR DOES

NOT GO TO FLIGHT STOW (PYLON ACTG

SWITCH SET TO UP)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

RIGHT OUTBOARD PYLON DOES NOT MOVE

(PYLON ACTG SWITCH SET TO UP THEN

DOWN)

TM 1–1520–238–T–8 EXTERNAL STORES

ELEVATION

CONTROL

RIGHT OUTBD PYLON ACTUATOR DOES NOT

RETURN TO GROUND STOW (PYLON ACTG

SWITCH SET TO DOWN)

TM 9–1090–208–23–2 EXTERNAL STORES

CONTROL SYSTEM

RIGHT WHITE ANTI–COLLISION LIGHT DOES

NOT FLASH (PILOT EXT LT/INTR LT PANEL:

ANTI COL SWITCH SET TO WHT)

TM 1–1520–238–T–6 ANTI–COLLISION

LIGHTS

RIG PIN CANNOT BE INSTALLED IN

COLLECTIVE SERVOCYLINDER BELLCRANK

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIG PIN CANNOT BE INSTALLED IN CPG

COLLECTIVE STICK

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIG PIN CANNOT BE INSTALLED IN CPG

CYCLIC STICK HOUSING

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIG PIN CANNOT BE INSTALLED IN CPG

DIRECTIONAL SPAD

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIG PIN CANNOT BE INSTALLED IN FS 348

BELLCRANK

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM
TM 1–1520–238–T–2

Change 4 2–165/(2–166 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RIG PIN CANNOT BE INSTALLED IN FS 542

BELLCRANK

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIG PIN CANNOT BE INSTALLED IN LATERAL

SERVOCYLINDER BELLCRANK

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RIG PIN CANNOT BE INSTALLED IN

LONGITUDINAL SERVOCYLINDER

BELLCRANK

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

RMI BEARING POINTER DOES NOT INDICATE

CORRECT BEARING (ADF RCVR CONTROL

PANEL: ADF LOOP CONTROL ROTATED

FROM CENTER TOWARD R)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RMI COMPASS CARD DOES NOT INDICATE

HEADING CHANGES

TM 11–1520–238–23–2 HARS

RMI COMPASS CARD DOES NOT DISPLAY

CORRECT BEARING (ADF RCVR CONTROL

PANEL: ADF LOOP CONTROL ROTATED

FROM CENTER TO R)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RMI EDGE LIGHT DOES NOT LIGHT (CPG INTR

LT PANEL: INST CONTROL ROTATED TO

BRT)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RMI HEADING OFF WARNING FLAG IS IN VIEW TM 11–1520–238–23–2 HARS

RMI POINTER DOES NOT MOVE (ADF RCVR

CONTROL PANEL: CW/VOICE/TEST SWITCH

SET TO TEST)

TM 11–1520–238–23–2 NAVIGATION

INSTRUMENTS

RNDS 0200 DOES NOT APPEAR ON HOD (CPG

CYCLIC STICK: R/G/M/C SWITCH SET TO G)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

RNDS CNTR – MAG CONTROLLER NO–GO AFT

OF LH FAB APPEARS ON HOD (ACY)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

RNDS CNTR – MAG CONT NO–GO AFT OF LH

FAB APPEARS ON HOD (ACZ)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

RNDS XXXX DOES NOT APPEAR ON HOD AND

GUN TURRET DOES NOT UNSTOW (PILOT

CYCLIC STICK: R/G/M/C SWITCH SET TO G)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

TM 1–1520–238–T–2

Change 4 2–167

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

RNDS XXXX DOES NOT APPEAR ON VDU AND

GUN TURRET DOES NOT UNSTOW (PILOT

CYCLIC ACTIONED)

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

ROCKET INDICATOR ON CPG

CAUTION/WARNING PANEL LIGHTS

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL NO–GO PILOTS

COMPARTMENT APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL NO–GO PILOTS

COMPARTMENT AND ALL STATION

DIRECTOR NO–GO APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL QTY REM

DISPLAYS INCORRECT ALL ZONES

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL QTY REM

DISPLAYS INCORRECT ZONE A AND/OR C

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL QTY REM

DISPLAYS INCORRECT ZONE B AND/OR D

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL QTY REM

DISPLAYS INCORRECT ZONE E

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET CONTROL PANEL QTY REM

INDICATORS DO NOT DIM

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET STEERING CURSOR AND ZONE?

DOES NOT APPEAR ON HOD CRKT DOES

NOT APPEAR ON VDU

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROCKET STEERING CURSOR DOES NOT

APPEAR ON VDU PRKT DOES NOT APPEAR

ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

ROLL SWITCH DOES NOT STAY ON AND ASE

INDICATOR IS LIGHTED

TM 1–1520–238–T–7 DASE

ROTOR BRAKE DOES NOT STOP ROTATION

OF MAIN ROTOR BLADE ASSEMBLY (PILOT

POWER QUADRANT: RTR BK SWITCH SET

TO BRAKE)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

ROTOR BRAKE NO–GO PLT COMPARTMENT

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

ROTORS BEGIN TO TURN (EXTERNAL

PRIMARY HYDRAULIC POWER APPLIED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM
TM 1–1520–238–T–2

2–168

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

ROTORS BEGIN TO TURN (EXTERNAL UTILITY

HYDRAULIC POWER APPLIED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

ROUNDS COUNT DISPLAYED ON HOD IS NOT

CORRECT

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

RTR BLADE DISTR DE–ICE NO–GO MAIN RTR

MAST APPEARS ON HOD (APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADE

DE–ICE

RTR BLADE PWR CONTROLLER NO–GO RH

XMSN BAY APPEARS ON HOD (APU

OPERATING)

TM 1–1520–238–T–8 ROTOR BLADE

DE–ICE

RTR BRK CIRCUIT BREAKER (CB37) DOES

NOT STAY CLOSED (EXTERNAL PRIMARY

HYDRAULIC POWER APPLIED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

RTR BRK CIRCUIT BREAKER (CB37) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

RTR BRK CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT ASE PANEL: BUCS TST

SWITCH SET TO CPG)

TM 1–1520–238–T–7 DASE

RTR BRK CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT ASE PANEL: BUCS TST

SWITCH SET TO PLT)

TM 1–1520–238–T–7 DASE

RTR BRK CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT POWER QUADRANT: RTR

BK SWITCH SET TO BRAKE AND PWR

LEVERS SET TO OFF)

TM 1–1520–238–T–7 DASE

RTR BRK INDICATOR IS LIGHTED (PILOT

POWER QUADRANT: RTR BK SWITCH SET

TO OFF)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

RTR BRK INDICATOR IS NOT LIGHTED (PILOT

POWER QUADRANT: RTR BK SWITCH SET

TO BRAKE)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM
TM 1–1520–238–T–2

Change 5 2–169

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

SAFE INDICATOR DOES NOT LIGHT (CPG FCP:

SWITCH SET TO SAFE AND MSL SWITCH

SET TO OFF)

TM 9–1427–475–20 HME SYSTEM

SAFE SAFE DOES NOT APPEAR ON HOD OR

FAIL FAIL APPEARS ON HOD (MSL

LAUNCHERS LATCHED AND SET TO SAFE)

(CPG FCP: MSL SWITCH SET TO ON)

TM 9–1427–475–20 HME SYSTEM

SAFE SAFE INDICATION REMAINS ON HOD

(CPG FCP: CPG SWITCH SET TO ARM)

TM 9–1427–475–20 HME SYSTEM

SAFE SAFE (LT INBD LCHR) OR FAIL FAIL

MESSAGE APPEARS ON HOD (CPG FCP:

CPG SWITCH SET TO SAFE)

TM 9–1427–475–20 HME SYSTEM

SAFE SAFE REMAINS ON HOD (PILOT FCP:

MASTER ARM SWITCH SET TO ARM) (CPG

FCP: SWITCH SET TO ARM)

TM 9–1427–475–20 HME SYSTEM

SAFE SAFE (RT INBD LCHR) OR FAIL FAIL

MESSAGE APPEARS ON HOD (CPG FCP:

CPG SWITCH SET TO SAFE)

TM 9–1427–475–20 HME SYSTEM

SCRATCH PAD DOES NOT GO BLANK (CDU:

KEY NAV FAB PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

SCRATCH PAD IS NOT NOW BLANK AND CDU

DOES NOT DISPLAY THE FOLLOWING ON

LINE 1 PPOS 12S VN 3262 0377 AND LINE 2

VAR E012.0 SPH CLO

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

SCRATCH PAD IS NOT NOW BLANK AND CDU

DOES NOT DISPLAY THE FOLLOWING ON

LINE 1 H 12S WN 0000 0000 AND LINE 2

E010.0 CL6

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

SCRATCH PAD IS NOT NOW BLANK AND CDU

DOES NOT DISPLAY THE FOLLOWING ON

LINES 3, 1 12S WN 0000 2500 AND LINE 4

E010.0 CL6 (CDU: DATA ENTERED ON

SCRATCH PAD AND VAB NEXT TO

DISPLAYED NUMBER PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137
TM 1–1520–238–T–2

2–170 Change 5

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

SCU 1 NO-GO LH CATWALK APPEARS ON HOD

(AAC)

TM 1–1520–238–T–7 STABILATOR

SCU 2 NO-GO LH CATWALK APPEARS ON HOD

(AAC)

TM 1–1520–238–T–7 STABILATOR

SDCC (ONLY) FAILS TO ZEROIZE (ADD) TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

SDCC (ONLY) UNCOMMANDED ZEROIZE (ADD) TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137 (ADD)

SELF TEST INDICATOR IS NOT LIGHTED

(PILOT FIRE CONTROL PANEL: MASTER

SWITCH SET TO SAFE)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

SERVOCYLINDER DOES NOT TRAVEL FULL

STROKE (EXTERNAL PRIMARY HYDRAULIC

POWER APPLIED)

TM 1–1520–238–T–5 PRIMARY

HYDRAULIC SYSTEM

SEU NO–GO RH FAB APPEARS ON HOD TM 9–1270–221–23 IHADSS

SHAFT DRIVEN COMP INDICATOR IS LIGHTED

(ENGINE 1 OPERATING)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

SHAFT DRIVEN COMP INDICATOR IS NOT

LIGHTED (FOR APPROXIMATELY 60

SECONDS AFTER APU START)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

SHAFT DRIVEN COMP INDICATOR REMAINS

LIGHTED (FOR LONGER THAN

APPROXIMATELY 60 SECONDS AFTER APU

START)

TM 1–1520–238–T–5 PRESSURIZED AIR

SYSTEM

SHORT BEEP IS HEARD IN HEADSET

(CIPHONY PANEL: MODE SWITCH SET TO

CIPHER, PILOT PTT SWITCH AND RADIO

TRANSMITTER FOOT SWITCH PRESSED

AND HELD)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

SHORT BEEP IS NOT HEARD IN HEADSET AT

BEGINNING OF TRANSMISSION (PILOT

RADIO TRANSMIT FOOT SWITCH

DEPRESSED AND HELD)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT

SIDETONE AUDIO NOT HEARD IN HEADSET

(PILOT CYCLIC STICK: RADIO PUSH TO

TALK OR RADIO TRANSMITTER FOOT

SWITCH PRESSED)

TM 11–1520–238–23–2 TSEC/KY–28

COMMUNICATIONS

SECURITY

EQUIPMENT
TM 1–1520–238–T–2

Change 3 2–171

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

SIM LAUNCH DOES NOT APPEAR ON HOD

(CPG CYCLIC STICK: TRIGGER PULLED TO

FIRST DETENT FOR TEN SECONDS THEN

TO SECOND DETENT)

TM 9–1427–475–20 HME SYSTEM

SIM LAUNCH AND TOF COUNT DOWN DO NOT

APPEAR ON VDU (PILOT CYCLIC STICK:

TRIGGER PULLED)

TM 9–1427–475–20 HME SYSTEM

SOME INDICATORS ARE NOT LIGHTED OR

FLASHING (CPG MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING PANEL

SOME INDICATORS ARE NOT LIGHTED OR

FLASHING (PILOT MASTER CAUTION/

WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING PANEL

SQUAT SWITCH NO–GO AFT OF LH FAB

APPEARS ON HOD

TM 1–1520–238–T–7 DASE

STAB AUTO AC CIRCUIT BREAKER (CB2) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

STAB AUTO AC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

STAB AUTO DC CIRCUIT BREAKER (CB3)

DOES NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 3 –

PILOT STATION)

STAB AUTO DC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

STAB CONTROL UNIT 1 NO–GO LH AFT

CATWALK APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

STAB CONTROL UNIT 2 NO–GO LH AFT

CATWALK APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR
TM 1–1520–238–T–2

2–172

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

STAB MAN AC CIRCUIT BREAKER (CB7) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

PILOT STATION)

STAB MAN AC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

STAB MAN DC CIRCUIT BREAKER (CB6) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

PILOT STATION)

STAB MAN DC CIRCUIT BREAKER DOES NOT

STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INDICATE 13.5

±2° ND (PITOT TESTER: AIRSPEED SET TO

100 ±2 KNOTS) (PILOT COLLECTIVE STICK:

FULL UP POSITION)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INDICATE 15

±2° ND (PITOT TESTER: AIRSPEED SET TO

83 ±2 KNOTS)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INDICATE 25

±2° ND OR NOE/APRCH SWITCH

DISENGAGES (PILOT ASE PANEL:

NOE/APRCH SWITCH SET TO NOE/APRCH)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INDICATE 25

±2° ND (PILOT OR CPG COLLECTIVE STICK:

RESET PUSHBUTTON PRESSED)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INDICATE

2 ±2° ND (PITOT TESTER: AIRSPEED SET TO

155 ±2 KNOTS) (PILOT COLLECTIVE STICK:

FULL UP POSITION)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INDICATE 21

±2° ND (PITOT TESTER: AIRSPEED SET TO

80 ±2 KNOTS) (PILOT COLLECTIVE STICK:

FULL UP POSITION)

TM 1–1520–238–T–7 STABILATOR
TM 1–1520–238–T–2

Change 4 2–173

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

STAB POS INDICATORS DO NOT INDICATE 35

±2° ND (PITOT TESTER: AIRSPEED

REDUCED TO ZERO (0) KNOTS) (CPG

COLLECTIVE STICK: ND/NU SWITCH

PULSED TO ND POSITION UNTIL

STABILATOR REACHES DOWN LIMIT)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS DO NOT INITIALLY

INDICATE 25 ±2° ND THEN DECREASES TO

20 ±2° (PITOT TESTER: AIRSPEED SET TO

60 ±2 KNOTS)

TM 1–1520–238–T–7 STABILATOR

STAB POS INDICATORS SHOW MOVEMENT

(PITOT TESTER: AIRSPEED SET TO 85 ±2

KNOTS) (PILOT COLLECTIVE STICK: ND/NU

SWITCH PULSED TO ND FOR TWO

SECONDS)

TM 1–1520–238–T–7 STABILATOR

STAB POS NOT AT 2 ±2° NU FOR 165 KNOTS

AND COLLECTIVE CENTERED

TM 1–1520–238–T–7 STABILATOR

STAB POS NOT AT 19 ±2° NU FOR 70 KNOTS

AND COLLECTIVE CENTERED

TM 1–1520–238–T–7 STABILATOR

STABILATOR DOES NOT MOVE TO WITHIN ±2°

OF 9° NU (PILOT COLLECTIVE STICK: ND/NU

SWITCH PULSED TO NU UNTIL STAB POS

INDICATOR INDICATES FULL UP POSITION)

TM 1–1520–238–T–7 STABILATOR

STABILATOR DOES NOT MOVE EITHER UP OR

DOWN OR STAB MAN DC CIRCUIT BREAKER

DOES NOT STAY CLOSED

TM 1–1520–238–T–7 STABILATOR

STATION DIRECTOR NO–GO LT INBD AND LT

OUTBD APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

STATION DIRECTOR NO–GO LT INBD APPEARS

ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

STATION DIRECTOR NO–GO LT OUTBD

APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

STATION DIRECTOR NO–GO RT INBD AND RT

OUTBD APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

STATION DIRECTOR NO–GO RT INBD

APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

STATION DIRECTOR NO–GO RT OUTBD

APPEARS ON HOD

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM
TM 1–1520–238–T–2

2–174 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

STBY ATTD CIRCUIT BREAKER (CB19) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

STORES JETT PANEL EDGE–LIGHTING DOES

NOT LIGHT (PILOT EXT LT/INTR LT PANEL: L

CSL CONTROL ROTATED TO BRT)

TM 1–1520–238–T–8 EXTERNAL STORES

JETTISON

SYM GEN – LT BUS NO–GO APPEARS ON HOD

(ACZ)

TM 9–1090–208–23–2 MULTIPLEX

SUBSYSTEM

SYM GEN – RT BUS NO–GO APPEARS ON HOD

(ACZ)

TM 9–1090–208–23–2 MULTIPLEX

SUBSYSTEM

SYM LAUNCH AND THEN TOF MESSAGE DO

NOT APPEAR ON HOD (ORT: TRIGGER

PULLED)

TM 9–1427–475–20 HME SYSTEM

SYM LAUNCH DOES NOT APPEAR ON HOD

(CPG CYCLIC STICK: TRIGGER PULLED)

TM 9–1427–475–20 HME SYSTEM

SYMBOL GENERATOR DOES NOT RESPOND

TO SYMBOL SELECTION (CPG FIRE

CONTROL PANEL: MUX SWITCH SET TO

SEC)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

SYMBOL GENERATOR GO DOES NOT APPEAR

ON HOD

TM 11–1520–238–23–2 SYMBOL

GENERATOR

SYMBOL GENERATOR NO–GO LH FAB DOES

NOT APPEAR ON HOD (CPG FIRE CONTROL

PANEL: SYSTEM FC SYM GEN SWITCH SET

TO FC SYM GEN)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

SYMBOL GENERATOR NO–GO RH FAB DOES

NOT APPEAR ON HOD (CPG FIRE CONTROL

PANEL: SYSTEM FC SYM GEN SWITCH SET

TO OFF)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

SYMBOL GENERATOR SYMBOLS DO NOT

APPEAR ON ORT AND VDU (DEK: DATA

ENTRY SWITCH SET TO STBY)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

SYMBOLOGY DOES NOT APPEAR ON HOD

(VDU: MODE SWITCH SET TO CPG)

TM 11–1520–238–23–2 VIDEO RECORDER

SYMBOLOGY DOES NOT APPEAR ON VDU OR

BRIGHTNESS CANNOT BE ADJUSTED (VDU:

MODE SWITCH SET TO CPG AND

ADJUSTED TO BRT)

TM 11–1520–238–23–2 VIDEO RECORDER
TM 1–1520–238–T–2

2–175

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

SYMBOLS ON CPG IHADSS DO NOT BRIGHTEN

(ORT: SYM BRT CONTROL ACTIONED)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

SYMBOLS ON PILOT IHADSS DO NOT

BRIGHTEN (PILOT FIRE CONTROL PANEL:

IHADSS VID SYM BRT CONTROL ROTATED)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

TADS AC CIRCUIT BREAKER (CB3) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (AC

ESSENTIAL BUS 1 –

CPG STATION)

TADS DC CIRCUIT BREAKER (CB2) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 1 –

CPG STATION)

TADS FLIR VIDEO IS NOT DISPLAYED ON VDU

(PILOT FIRE CONTROL PANEL: FLIR VID,

GAIN AND LEVEL ADJUSTED)

TM 11–1520–238–23–2 VIDEO RECORDER

TADS INDICATORS ARE NOT LIGHTED (CPG

FIRE CONTROL PANEL: TADS SWITCH SET

TO TADS)

TM 1–1520–238–T–6 CPG CAUTION AND

WARNING SYSTEM

TADS SHROUD WINDOW HEATERS DO NOT

COOL (CPG FIRE CONTROL PANEL:

SYSTEM TADS SWITCH SET TO OFF) (CPG

AUX/ANTI–ICE PANEL: TADS/PNVS SWITCH

SET TO OFF)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

TADS SHROUD WINDOW HEATERS DO NOT

HEAT (CPG FIRE CONTROL PANEL: SYSTEM

TADS SWITCH SET TO TADS) (CPG

AUX/ANTI–ICE PANEL: TADS/PNVS SWITCH

SET TO GND)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

TADS SHROUD WINDOW HEATERS DO NOT

HEAT (CPG FIRE CONTROL PANEL: SYSTEM

TADS SWITCH SET TO TADS) (CPG

AUX/ANTI–ICE PANEL: TADS/PNVS SWITCH

SET TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE
TM 1–1520–238–T–2

2–176

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TADS TURRET DOES NOT FOLLOW CPG HEAD

MOVEMENTS (CPG FC PANEL: SIGHT SEL

SWITCH SET TO HMD/TADS)

TM 9–1270–221–23 IHADSS

TADS VIDEO AND SYMBOLS ARE NOT

DISPLAYED (ORT: VIDEO SEL SWITCH SET

TO TADS)

TM 11–1520–238–23–2 SYMBOL

GENERATOR

TAIL FORMATION LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: FORM

CONTROL ROTATED TO BRT)

TM 1–1520–238–T–6 FORMATION LIGHTS

TAIL NAVIGATION LIGHT DOES NOT LIGHT

(PILOT EXT LT/INTR LT PANEL: NAV SWITCH

SET TO DIM OR BRT)

TM 1–1520–238–T–6 NAVIGATION LIGHTS

TAIL ROTOR BLADES OUT OF BALANCE TM 1–1520–238–T–4 TAIL ROTOR

BALANCE

TAIL ROTOR HEATER NO–GO TAIL ROTOR

APPEARS ON HOD (APU OPERATING)

TM 1–1520–238–T–8 ROTOR BLADES

DE–ICE

TAIL WHEEL ADVISORY LIGHT DOES NOT

LIGHT (PILOT TAIL WHEEL LOCK PANEL:

UNLOCK/LOCK SWITCH SET TO UNLOCK)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

TAIL WHEEL DOES NOT RETURN TO

CENTERLINE

TM 1–1520–238–T–4 TAIL LANDING GEAR

TAIL WHEEL INDICATOR IS NOT LIGHTED

(PILOT FIRE CONTROL PANEL: MASTER

SWITCH SET TO OFF)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

TAIL WHEEL LOCK ACTUATOR DOES NOT

UNLOCK TAIL WHEEL (PILOT TAIL WHEEL

LOCK PANEL: UNLOCK/LOCK SWITCH SET

TO UNLOCK)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

TAIL WHEEL LOCKING PIN IS BINDING OR

DOES NOT DISENGAGE FROM LOCKING

PLATE

TM 1–1520–238–T–4 TAIL LANDING GEAR

TAIL WHEEL LOCK PANEL EDGE–LIGHT IS NOT

LIGHTED (PILOT EXT LT/INTR LT PANEL:

INST CONTROL ROTATED TO BRT)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM
TM 1–1520–238–T–2

Change 6 2–177

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TEMP TR INDICATOR IS LIGHTED ON BOTH

CAUTION/WARNING PANELS (MASTER

CAUTION/WARNING PANELS: PRESS TO

TEST INDICATOR PRESSED)

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

TEMP TR INDICATOR LIGHTS (ENGINES 1 AND

2 OPERATING)

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

TEST GO INDICATOR DOES NOT LIGHT (MODE

C) (AN/APM–424 TRANSPONDER TEST SET:

TEST SEQ SWITCH PRESSED AND

RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT OR

REJECT INDICATOR LIGHTS OR ANT

STATUS INDICATOR LIGHTS (ANT SWITCH

AT BOT)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT OR

REJECT INDICATOR LIGHTS OR ANT

STATUS INDICATOR LIGHTS (ANT SWITCH

AT TOP)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT (PILOT

IFF TRANSPONDER CONTROL PANEL: M1

SWITCH SET TO ON AND M–2 SWITCH HELD

TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT (PILOT

IFF TRANSPONDER CONTROL PANEL: M–1

SWITCH HELD TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT (PILOT

IFF TRANSPONDER CONTROL PANEL: M–2

SWITCH SET TO ON AND M–3/A SWITCH

HELD TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT (PILOT

IFF TRANSPONDER CONTROL PANEL:

M–3/A SWITCH SET TO ON AND M–C

SWITCH HELD TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR DOES NOT LIGHT (PILOT

IFF TRANSPONDER CONTROL PANEL:

MODE 4 TEST SWITCH SET TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

2–178 Change 6

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TEST GO INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

(PILOT IFF TRANSPONDER CONTROL

PANEL: ANT SWITCH SET TO BOT, MODE 1,

2, AND 3/A TESTS PERFORMED)

TM 11–1520–238–23–2 IFF SYSTEM

TEST GO INDICATOR ON AN/APM–378

TRANSPONDER TEST SET DOES NOT LIGHT

ON MODE 1, 2, AND 3/A (PILOT IFF

TRANSPONDER CONTROL PANEL: MODE 1,

2, AND 3/A TESTS PERFORMED)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/GO, MODE 4 REPLY AND TEST/MON

NO–GO INDICATORS DO NOT LIGHT (PILOT

IFF TRANSPONDER CONTROL PANEL:

MODE 4 TEST SWITCH SET TO OUT AND

EACH INDICATOR PRESSED)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/MON NO–GO INDICATES OR IFF

INDICATORS LIGHT (PILOT IFF

TRANSPONDER CONTROL PANEL: M–3A

SWITCH SET TO ON AND M–C SWITCH

HELD TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/MON NO–GO INDICATOR LIGHTS (PILOT

IFF TRANSPONDER CONTROL PANEL:

MODE 4 CODE SWITCH SET TO B)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/MON NO–GO INDICATOR LIGHTS (PILOT

IFF TRANSPONDER CONTROL PANEL:

MODE 4 CODE SWITCH SET TO B)

(AN/APM–424 TRANSPONDER TEST SET:

TEST SEQ SWITCH PRESSED AND

RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/MON NO–GO INDICATOR LIGHTS (PILOT

IFF TRANSPONDER CONTROL PANEL:

MODE 4 CODE SWITCH SET TO ON)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/MON NO–GO INDICATORS ON IFF

TRANSPONDER LIGHTS (PILOT IFF

TRANSPONDER CONTROL PANEL: MODE 4

CODE SWITCH SET TO ON) (AN/APM–424

TRANSPONDER TEST SET: TEST SEQ

SWITCH PRESSED AND RELEASED)

TM 11–1520–238–23–2 IFF SYSTEM
TM 1–1520–238–T–2

2–179

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TEST/MON NO–GO INDICATORS OR IFF

INDICATORS LIGHT (PILOT IFF

TRANSPONDER CONTROL PANEL: M–1

SWITCH SET TO ON AND M–2 SWITCH HELD

TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST/MON NO–GO INDICATORS OR IFF

INDICATORS LIGHT (PILOT IFF

TRANSPONDER CONTROL PANEL: M–2

SWITCH SET TO ON AND M–3/A SWITCH

HELD TO TEST)

TM 11–1520–238–23–2 IFF SYSTEM

TEST PATTERN APPEARS BUT IS DISTORTED

(VDU: MODE SWITCH HELD TO TEST AND

BRT AND CTRS CONTROLS ADJUSTED)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

TGT INDICATOR EXCEEDS 867° C (1560° F)

(ENGINE 1 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

TGT INDICATOR EXCEEDS 867° C (1560° F)

(ENGINE 2 STARTING UP)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

TGT, NG, ENG–RTR RPM%, TORQUE AND ENG

OIL INDICATORS DO NOT GO TO FULL

SCALE FOR 3 SECONDS OR DO NOT SHOW

888 IN DIGITAL DISPLAYS (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH SET

TO TST)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 1)

TGT, NG, ENG–RTR RPM%, TORQUE AND ENG

OIL INDICATORS DO NOT GO TO FULL

SCALE FOR 3 SECONDS OR DO NOT SHOW

888 IN DIGITAL DISPLAYS (PILOT DIM/TEST

PANEL: DGT OFF/NORM/TST SWITCH TO

TST)

TM 1–1520–238–T–4 POWER PLANTS

(ENGINE 2)

THROT CIRCUIT BREAKER (CB8) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

TOF COUNTDOWN FOR FIRST MISSILE DOES

NOT APPEAR ON HOD (CPG CYCLIC STICK:

TRIGGER PULLED)

TM 9–1427–475–20 HME SYSTEM
TM 1–1520–238–T–2

2–180

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TOF COUNTDOWN FOR FIRST MISSILE IS NOT

MOMENTARILY INTERRUPTED BY SYM

LAUNCH MESSAGE FOR SECOND MISSILE

(CPG CYCLIC STICK: TRIGGER PULLED)

TM 9–1427–475–20 HME SYSTEM

TOF COUNTDOWN FOR FIRST MISSILE IS NOT

MOMENTARILY INTERRUPTED BY SYM

LAUNCH MESSAGE FOR SECOND MISSILE

ON VDU (PILOT MSL PANEL: LSR CODE

SWITCH SET TO LWR) (PILOT CYCLIC

STICK: TRIGGER PULLED TO SECOND

DETENT)

TM 9–1427–475–20 HME SYSTEM

TONE IS NOT HEARD IN CPG HEADSET (CPG

VIDEO RECORDER CONTROL PANEL:

EVENT MARK TIME ON MIN DISPLAY IS

REACHED)

TM 11–1520–238–23–2 VIDEO RECORDER

TOP PISTON FAILS TO MOVE STABILATOR,

ONLY BOTTOM PISTON OF ACTUATOR

MOVES STABILATOR UP HALFWAY (PILOT

COLLECTIVE STICK: ND/NU SWITCH

PULSED TO NU UNTIL STAB POS INDICATOR

INDICATES FULL UP POSITION)

TM 1–1520–238–T–7 STABILATOR

TOP STAB ACTUATOR NO–GO TAIL SECTION

APPEARS ON HOD

TM 1–1520–238–T–7 STABILATOR

TORQUE, TGT, NG RPM% AND ENG–RTR

RPM% INDICATORS DO NOT LIGHT (CPG

INTR LT PANEL: INST CONTROL ROTATED

TO BRT)

TM 1–1520–238–T–5 ENGINE

INSTRUMENTS

TRAIN RATE SENSOR NO–GO TURRET ASSY

APPEARS ON HOD

TM 9–1090–208–23–2 AREA WEAPON

SYSTEM

TRANSMIT AUDIO IS NOT HEARD IN HEADSET

(PILOT CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY

EQUIPMENT
TM 1–1520–238–T–2

Change 5 2–181

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TRANSMIT AUDIO IS NOT PRESENT IN BOTH

HEADSETS (CPG TRANSMITTING) (CPG

CYCLIC STICK: RADIO/ICS SWITCH SET TO

RADIO)

TM 11–1520–238–23–2 UHF–AM RADIO SET

TRANSMIT AUDIO IS NOT PRESENT IN BOTH

HEADSETS (PILOT TRANSMITTING) (PILOT

CYCLIC STICK: RADIO/ICS SWITCH SET TO

RADIO)

TM 11–1520–238–23–2 UHF–AM RADIO SET

TRANSMIT AUDIO (CPG) IS NOT PRESENT IN

EITHER HEADSET (CPG TRANSMITTING)

(CPG CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

TRANSMIT AUDIO IS NOT PRESENT IN EITHER

HEADSET (PILOT TRANSMITTING) (PILOT

CYCLIC STICK: RADIO/ICS SWITCH SET TO

RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

TRANSMIT AUDIO (PILOT) IS NOT PRESENT IN

EITHER HEADSET (CPG TRANSMITTING)

(CPG CYCLIC STICK: RADIO/ICS SWITCH

SET TO RADIO)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET

TRANSMIT POWER IS REPORTED TO BE

WEAK OR NOT CLEAR (PILOT OR CPG

TRANSMITTING) (PILOT OR CPG CYCLIC

STICK: RADIO/ICS SWITCH SET TO RADIO)

TM 11–1520–238–23–2 UHF–AM RADIO SET

TRIM CIRCUIT BREAKER (CB87) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

EMERGENCY BUS –

PILOT STATION)

TRIM CIRCUIT BREAKER DOES NOT STAY

CLOSED (ADC)

TM 11–1520–238–23–2 HARS

TRIM CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT CYCLIC STICK: FORCE

TRIM REL SWITCH PUSHED TO OFF)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM
TM 1–1520–238–T–2

2–182

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TRIM CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT CYCLIC STICK: FORCE

TRIM REL SWITCH PUSHED TO RELEASE)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

TRIM CIRCUIT BREAKER DOES NOT STAY

CLOSED (PILOT CYCLIC STICK: FORCE

TRIM REL SWITCH SET TO ON)

TM 1–1520–238–T–7 FLIGHT CONTROL

SYSTEM

TSEC/KY–58 FRONT PANEL EDGE LIGHT (AND

RCU) IS NOT LIGHTED (PILOT EXT LT/INTR

LT PANEL: R/CTR CSL CONTROL ROTATED

TO BRT)

TM 11–1520–238–23–2 TSEC/KY–58

COMMUNICATIONS

SECURITY

EQUIPMENT

TTG AND DIST DATA DO NOT START

DECREASING (CDU: KEYBOARD NUMBER

150 ENTERED ON SCRATCH PAD AND VAB

NEXT TO DISPLAYED WORD KPH PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

TURN AND SLIP INDICATOR DOES NOT MOVE

TO THE LEFT (HARS PHYSICALLY TURNED

TO SIMULATE ROLL)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

TURN AND SLIP INDICATOR DOES NOT MOVE

TO THE RIGHT (HARS PHYSICALLY TURNED

TO SIMULATE ROLL)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

TURN AND SLIP INDICATOR EDGE LIGHT

DOES NOT LIGHT (PILOT EXT LT/INTR LT

PANEL: INST CONTROL ROTATED TO BRT)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

TWHL LOCK CIRCUIT BREAKER (CB59) DOES

NOT STAY CLOSED (PILOT ELEC PWR

PANEL: BATT/EXT PWR SWITCH SET TO EXT

PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

TWHL LOCK CIRCUIT BREAKER (CB59) DOES

NOT STAY CLOSED (PILOT TAIL WHEEL

LOCK PANEL: UNLOCK LOCK SWITCH SET

TO LOCK)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM
TM 1–1520–238–T–2

Change 4 2–183

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TYPE I MRTU – LT BUS NO–GO LH FAB

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU – LT BUS NO–GO RH FAB

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU – RT BUS NO–GO LH FAB

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU – RT BUS NO–GO RH FAB

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU NO–GO LH FAB APPEARS ON

HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU NO–GO LH FAB APPEARS ON

HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU NO–GO LH FAB APPEARS ON

HOD (SEC BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU NO–GO RH FAB APPEARS ON

HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU NO–GO RH FAB APPEARS ON

HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – LT BUS NO–GO LH INBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – LT BUS NO–GO LH OUTBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – LT BUS NO–GO RH INBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – LT BUS NO–GO RH OUTBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – RT BUS NO–GO LH INBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – RT BUS NO–GO LH OUTBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM
TM 1–1520–238–T–2

2–184 Change 4

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TYPE II MRTU – RT BUS NO–GO RH INBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU – RT BUS NO–GO RH OUTBD

APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO LH INBD APPEARS ON

HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO LH INBD APPEARS ON

HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO LH INBD APPEARS ON

HOD (SEC BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO LH OUTBD APPEARS ON

HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO LH OUTBD APPEARS ON

HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO LH OUTBD APPEARS ON

HOD (SEC BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO RH INBD APPEARS ON

HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO RH INBD APPEARS ON

HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO RH OUTBD APPEARS

ON HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO RH OUTBD APPEARS

ON HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE I MRTU NO–GO RH FAB APPEARS ON

HOD (SEC BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO RH INBD APPEARS ON

HOD (PRI BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE II MRTU NO–GO RH OUTBD APPEARS

ON HOD (SEC BUS DETACHED) (ACY)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM
TM 1–1520–238–T–2

Change 5 2–185

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

TYPE III MRTU – LT BUS NO–GO CPG

COMPARTMENT APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE III MRTU – RT BUS NO–GO CPG

COMPARTMENT APPEARS ON HOD (ACZ)

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

TYPE III MRTU NO–GO CPG COMPARTMENT

APPEARS ON HOD

TM 9–1230–476–20–2 MULTIPLEX

SUBSYSTEM

UHF–AM RECEIVER/TRANSMITTER DOES NOT

TUNE TO PROPER CHANNEL

(MANUAL/GUARD/PRESET SWITCH SET TO

PRESET)

TM 11–1520–238–23–2 UHF–AM RADIO SET

UHF–AM RECEIVER/TRANSMITTER EDGE

LIGHT IS NOT LIGHTED (PILOT EXT LT/ INTR

LT PANEL: R/CTR CSL CONTROL ROTATED

TO BRT)

TM 11–1520–238–23–2 UHF–AM RADIO SET

UHF HAVE QUICK FAILS TO RETAIN TOD (ADD) TM 11–1520–238–23–2 UHF–AM RADIO SET

UNEVEN TIRE WEAR EXISTS TM 1–1520–238–T–4 MAIN LANDING

GEAR

UP=A (A FLASHING) LO=C AND DIR NORM DO

NOT APPEAR ON PILOT VDU (PILOT MSL

PANEL: LOAL SWITCH SET TO DIR)

TM 9–1427–475–20 HME SYSTEM

UPDT DOES NOT CHANGE TO PPOS (CDU:

VAB NEXT TO DISPLAYED WORD UPDT

PRESSED)

TM 11–1520–238–23–2 DOPPLER

NAVIGATION

SYSTEM (DNS)

AN/ASN–137

UTIL ACC PSI X 1000 INDICATOR DOES NOT

INDICATE 3000 PSI (PILOT APU FIRE TEST

PANEL: START/RUN/OFF SWITCH SET TO

OFF)

TM 1–1520–238–T–8 AUXILIARY POWER

UNIT

UTIL HYD INDICATOR DOES NOT INDICATE

3000 PSI (APU OPERATING)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

UTIL HYD INDICATOR DOES NOT INDICATE

3000 PSI (EXTERNAL UTILITY HYDRAULIC

POWER APPLIED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM
TM 1–1520–238–T–2

2–186 Change 6

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

UTIL HYD INDICATOR IS LIGHTED (CPG

CIRCUIT BREAKER PANEL 1: EMERG BATT

CAUT CIRCUIT BREAKER CLOSED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

UTIL HYD PSI INDICATOR IS LIGHTED

(EXTERNAL UTILITY HYDRAULIC POWER

APPLIED)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

UTIL HYD PSI INDICATOR IS NOT LIGHTED

(HYDRAULIC HAND PUMP SELECTOR VALVE

SET TO AFT)

TM 1–1520–238–T–5 UTILITY HYDRAULIC

SYSTEM

VDU CIRCUIT BREAKER DOES NOT STAY

CLOSED

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

VDU DISPLAY BRIGHTNESS IS NOT

ADJUSTABLE WITH BRT CONTROL (VDU:

MODE SWITCH SET TO TEST)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

VDU DISPLAY CONTRAST IS NOT ADJUSTABLE

WITH CTRS CONTROL (VDU: MODE SWITCH

SET TO TEST)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

VDU DISPLAY NO CHANGE IN HORIZON (VDU:

ROLL TRIM CONTROL ADJUSTED)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

VDU HDG TAPE/RAI, HSI AND RMI OFF FLAGS

ARE VISIBLE (ADC) OR HARS GO, VDU HDG

TAPE AND HSI OFF FLAG ARE VISIBLE

(ADD)

TM 11–1520–238–23–2 HARS

VDU HI ALTITUDE WARNING IS NOT

DISPLAYED (RADAR ALTIMETER HEIGHT

INDICATOR: HI SET INDICATOR PRESSED

AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

VDU LO ALTITUDE WARNING IS NOT

DISPLAYED (RHI: LO SET INDICATOR

PRESSED AND HELD)

TM 11–1520–238–23–2 RADAR ALTIMETER

SET

VDU EDGE LIGHT DOES NOT LIGHT (PILOT

EXT LT/INTR LT PANEL: INST CONTROL

ROTATED TO BRT)

TM 11–1520–238–23–2 VIDEO DISPLAY UNIT

(VDU)

VHF AM–FM RECEIVER/TRANSMITTER (CPG)

EDGE - LIGHT – IS NOT LIGHTED

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)
TM 1–1520–238–T–2

Change 6 2–187

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

VHF AM–FM RECEIVER/TRANSMITTER (PILOT)

EDGE - LIGHT – IS NOT LIGHTED

(HELICOPTER SERIAL NO. 82-23355 THRU

83–23798) (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RECEIVER/TRANSMITTER (PILOT)

EDGE - LIGHT – IS NOT LIGHTED

(HELICOPTER SERIAL NO. 83-23799 AND

SUBSEQUENT) (ADI)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADI)

VHF AM–FM RECEIVE AUDIO (CPG) – IS NOT

PRESENT IN CPG HEADSET

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RECEIVE AUDIO (CPG) – IS NOT

PRESENT IN EITHER HEADSET

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RECEIVE AUDIO (CPG) – IS NOT

PRESENT IN PILOT HEADSET

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RECEIVE AUDIO (PILOT) – IS NOT

PRESENT IN EITHER HEADSET (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RECEIVE AUDIO (PILOT) – IS NOT

PRESENT IN PILOT HEADSET (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RECEIVE AUDIO (PILOT) – IS NOT

PRESENT IN CPG HEADSET

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RADIO TRANSMIT POWER (CPG) –

IS LOW

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM RADIO TRANSMIT POWER (PILOT)

– IS WEAK OR NOT CLEAR (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM TRANSMIT AUDIO (CPG) – IS NOT

PRESENT IN EITHER HEADSET (CPG

TRANSMITTING) (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)
TM 1–1520–238–T–2

2–188 Change 6

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

VHF AM–FM TRANSMIT AUDIO (CPG) – IS NOT

PRESENT IN EITHER HEADSET (PILOT

TRANSMITTING)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM TRANSMIT AUDIO (PILOT) – IS

NOT PRESENT IN EITHER HEADSET (PILOT

TRANSMITTING) (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF AM–FM TRANSMIT AUDIO (PILOT) – IS

NOT PRESENT IN EITHER HEADSET (CPG

TRANSMITTING) (ADH)

TM 11–1520–238–23–2 VHF AM–FM RADIO

SET AN/ARC–186

(ADH)

VHF PLT, UHF AND VHF CPG INDICATORS ARE

NOT LIGHTED (PILOT MASTER

CAUTION/WARNING PANEL: PRESS TO TEST

INDICATOR PRESSED)

TM 1–1520–238–T–6 PILOT CAUTION AND

WARNING SYSTEM

VIB MON CIRCUIT BREAKER (CB79) DOES NOT

STAY CLOSED

TM 1–1520–238–T–4 DRIVE SYSTEM

INDICATORS

VIB MON CIRCUIT BREAKER (CB79) DOES NOT

STAY CLOSED (PILOT ELEC PWR PANEL:

BATT/EXT PWR SWITCH SET TO EXT PWR)

TM 1–1520–238–T–6 CIRCUIT

PROTECTION

SYSTEM (DC

ESSENTIAL BUS 2 –

PILOT STATION)

VIDEO DOES NOT APPEAR ON HOD (ORT:

FLIR/TV/DVO SWITCH SET TO TV)

TM 11–1520–238–23–2 VIDEO RECORDER

VIDEO DISPLAY IS STILL NOT STILL (CPG

VIDEO RECORDER CONTROL PANEL:

EVENT MARK TIME ON MIN DISPLAY IS

REACHED)

TM 11–1520–238–23–2 VIDEO RECORDER

VIDEO RECORDER CONTROL PANEL EDGE

LIGHT DOES NOT LIGHT (CPG INTR LT

PANEL: L CSL AND INST CONTROL

ROTATED TO BRT)

TM 11–1520–238–23–2 VIDEO RECORDER

VOLUME DOES NOT VARY IN HEADSETS

(RADAR WARNING CONTROL UNIT: AUDIO

CONTROL ADJUSTED)

TM 11–1520–238–23–2 INTEGRATED AUDIO

WARNING SYSTEM

(IAWS)

WINDSHIELDS DO NOT COOL (PILOT ANTI ICE

PANEL: CANOPY HTR SWITCH SET TO OFF)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE
TM 1–1520–238–T–2

Change 6 2–189/(2–190 blank)

Table 2–1. Master Failure Symptom Index (cont)

Failure Symptom Reference MOC

WINDSHIELDS DO NOT GET WARM (PILOT

ANTI ICE PANEL: CANOPY HTR SWITCH SET

TO ON)

TM 1–1520–238–T–8 CANOPY DEFOG

AND ANTI–ICE

WINDSHIELD WIPERS DO NOT PARK (PILOT

ANTI ICE PANEL: WSHLD WIPER SWITCH

SET TO PARK)

TM 1–1520–238–T–8 WINDSHIELD

WIPERS

XMN 1 OIL PRESSURE DISPLAY IS NOT 00 LB

APPEARS ON HOD

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

XMN 1 OIL TEMPERATURE DISPLAY IS NOT

–31° C APPEARS ON HOD

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

XMN 2 OIL PRESSURE DISPLAY IS NOT 00 LB

APPEARS ON HOD

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

XMN 2 OIL TEMPERATURE DISPLAY IS NOT

–31° C APPEARS ON HOD

TM 1–1520–238–T–4 DRIVE SYSTEM

DYNAMIC

YAW SWITCH DOES NOT STAY ON AND ASE

INDICATOR IS LIGHTED

TM 1–1520–238–T–7 DASE

ZONE AND ROCKET STEERING CURSOR

DOES NOT APPEAR ON HOD (ORT:

RKT/GUN/MSL SWITCH SET TO RKT)

TM 9–1090–208–23–2 AERIAL ROCKET

CONTROL SYSTEM

TM 1–1520–238–T–2

A–1

APPENDIX A

REFERENCES

A–1. SCOPE

This appendix contains a list of all official publications referenced in this technical volume.

A–2. MISCELLANEOUS MANUALS

DA Form 2028 Recommended Changes to Equipment Technical Publications . . . . . . . . . . . . 

DA Form 2028-2 Recommended Changes to Equipment Technical Publications . . . . . . . . . . 

DA PAM 738–751 Army Maintenance Management System – Aircraft (TAMMS–A) . . . . . . . . . 

FM 55-411 Maintenance Quality Control and Technical Inspection for Army Aircraft . . . . . . . . . . . . . . . 

SF 368 Deficiency Report . . . . . . . . . . . . . . . . . . . 

A–3. TECHNICAL MANUALS

TM 1–1520–238–T–1 Aviation Unit Maintenance Manual for Army AH–64A Helicopter Fault . . . . . . 

Detection/Location System

TM 1–1520–238–T–3 Aviation Unit Maintenance Manual for Army AH–64A Helicopter Multiplex Read . . . . . . 

Codes

TM 1–1520–238–T–4 Aviation Unit and Intermediate Troubleshooting Manual for Army AH–64A . . . . . . 

Helicopter

TM 1–1520–238–T–5 Aviation Unit and Intermediate Troubleshooting Manual for Army AH–64A . . . . . . 

Helicopter

TM 1–1520–238–T–6 Aviation Unit and Intermediate Troubleshooting Manual for Army AH–64A . . . . . . 

Helicopter

TM 1–1520–238–T–7 Aviation Unit and Intermediate Troubleshooting Manual for Army AH–64A . . . . . . 

Helicopter

TM 1–1520–238–T–8 Aviation Unit and Intermediate Troubleshooting Manual for Army AH–64A . . . . . . 

Helicopter

TM 1–1520–238–T–9 Aviation Unit and Intermediate Troubleshooting Manual for Army AH–64A . . . . . . 

Helicopter Theory of Operation

TM 1–1520–238–T–10 Aviation Unit Troubleshooting Manual for Army AH–64A Helicopter Wiring Diagrams . . . . . 

TM 11–1520–238–23–2 Aviation Unit and Intermediate Troubleshooting Manual, Army Model AH–64A . . . . 

Helicopter, Avionics Configuration

TM 750–244–1–5 Destruction of Army Material to Prevent Enemy Use . . . . . . . . . 

TM 9–1090–208–23–1 Aviation Unit and Intermediate Maintenance Manual for Armament Subsystem, . . . . . 

Helicopter: M139 Gun, Automatic, 30–Millimeter: M230 Rocket Management

Subsystem, Inventory–Deployment: M140

TM 9–1090–208–23–2 Aviation Unit and Intermediate Maintenance Manual for Armament Subsystem, . . . . . 

Helicopter: M139 Gun, Automatic, 30–Millimeter: M230 Rocket Management

Subsystem, Inventory–Deployment: M140
TM 1–1520–238–T–2

A–2 Change 8

REFERENCES (cont)

TM 9–1095–206–12&P Operator’s and Aviation Unit Maintenance Manual for Dispenser, General Purpose . . . . 

Aircraft: M130 Part No. 9311430 (1095–01–036–6886)

TM 9–1230–476–20–2 Aviation Unit Troubleshooting Manual for Army AH–64A Helicopter Fire Control . . . . . 

System

TM 9–1270–221–23 Aviation Unit and Intermediate Maintenance Manual for Fire Control Subsystem, . . . . . . . 

Helmet Directed: M142

TM 9–1427–475–20 Aviation Unit Maintenance Manual for Army AH–64A Helicopter HELLFIRE Missile . . . . . . . 

Equipment (Point Target Weapon System), and Launcher Interface (Launcher,

Guided Missile, Aircraft, M272 Part No. 13009444)
TM 1–1520–238–T–2

Change 5 GLOSSARY–1

GLOSSARY

AAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aft Avionics Bay

AC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternating Current

ACC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accessory/Accumulator

ACM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Control Module

ADS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Data Subsystem

ACQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Acquisition

ACT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Action

ACTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Actuator

AD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Data

ADF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Direction Finder

ADS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Data System

AGPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aviation Ground Power Unit

ALT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Altimeter

AM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amplitude Modulation

AMMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ammunition

AMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ampere

AND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alphanumeric Display

ANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Antenna

APU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary Power Unit

APRCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approach

ARCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aerial Rocket Control System

ARINC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aeronautical Radio Incorporated

ASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic Stabilization Equipment

ASN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aircraft Special Navigation

ASSY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Assembly

ATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Attitude

ATTD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Attitude

AUTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Automatic

AUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auxiliary
TM 1–1520–238–T–2

GLOSSARY–2 Change 5

GLOSSARY (cont)

AVI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Avionics

AVIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aviation Intermediate Maintenance

AVUM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aviation Unit Maintenance

AWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Area Weapon System

AZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Azimuth

BAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery

BATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery

BBC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Backup Bus Controller

BIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Built–in–test

BK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Break

BLWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Blower

BOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom

BRK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Break

BRSIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Boresight

BRT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bright

BRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Boresight Reticle Unit

BST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Boost

BTL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottle

BUCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Backup Control System

BYP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bypass

C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Celsius

CAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cabin

CAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calibration

CAUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Caution

CB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit Breaker

CCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Counter Counter Measures

CDU Control Display Unit, Computer Display Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

CH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel
TM 1–1520–238–T–2

GLOSSARY–3

GLOSSARY (cont)

CHAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Character

CHAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel

CHGR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Charger

CKT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Circuit

CLR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clear

CMD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Command

CNTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Counter

COLL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Collective

COMM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Communication/Common

COMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compressor

COMPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Complete

CONT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control

CONTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Control

CPG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copilot Gunner

CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Central Processing Unit

CRKT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copilot Rocket

CTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Contrast

CSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Communication System Control

CSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Console

CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous Wave

DAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Adjust Panel

DASE Digital Automatic Stabilization Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

DASEC Digital Automatic Stabilization Equipment Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct Current

DCPLR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Decoupler

DEG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Degree

DEK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Entry Keyboard
TM 1–1520–238–T–2

GLOSSARY–4 Change 5

GLOSSARY (cont)

DES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Designation

DEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Destination

DET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Detector

DEU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Electronics Unit

DGT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dim/Test Panel Engine Instruments

DICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . De–Ice

DIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct/Direction

DIR COS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct Cosine

DISP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display

DISCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Discharge

DISTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Distribution

DMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct Memory Access

DNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Doppler Navigation System

DOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Department of Defense

DPLR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Doppler

DR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Deficiency Report

DSA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Day Sensor Assembly

DSCRM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Discriminate

DTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Transfer Cartridge

DTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Data Transfer Unit

DTV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Day TV

DVO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Direct View Optics

EETF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic Equipmwnt Test Facility

ECA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic Control Amplifier

ECS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Environmental Control System

ECSP Electronic Command Signal Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

EED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic Explosive Devices

EGI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Embedded GPS–Inertial

EGT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine Gas Turbine

EL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Elevation
TM 1–1520–238–T–2

Change 5 GLOSSARY–5

GLOSSARY (cont)

ELEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical

EMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Emergency

EMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Empty

ENG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine

EXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External/Extinguisher

F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fahrenheit

FAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forward Avionics Bay

FC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fire Control

FCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fire Control Computer

FCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fire Control Panel

FD/LS Fault Detection and Location System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

FIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fault Isolation Procedure

FLIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forward Looking Infrared

FLT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Flight

FM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Frequency Modulation

FORM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Formation

FOV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Field of View

FR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front

FWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Forward

FXD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fixed

G . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grams

GCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gun Control Box

GCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Generator Control Unit

GEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Generator

GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ground

GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Global Positioning System

GRBX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear Box
TM 1–1520–238–T–2

GLOSSARY–6 Change 5

GLOSSARY (cont)

GUV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Group User Variables

GYRO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gyroscope

HARS Heading Attitude Reference System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

HDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heads Down Display

HDG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heading

HDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Helmet Display Unit

HI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High

HMD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Helmet Mounted Display

HME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hellfire Missile Equipment

HOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heads Out Display

HSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Helmet Sensor Equipment

HSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Horizontal Situation Indicator

HTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Heater

HYD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hydraulic

HZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hertz

IAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Image Auto Track

ICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Intercommunication System

ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identification

IFF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identification Friend or Foe

IGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ignition

IHADSS Integrated Helmet and Display Sight System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

IHU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Integrated Helmet Unit

INBD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inboard

IND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indicate

INOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inoperative

INS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inertial Navigation System

INT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal/Interior

INTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal/Interior
TM 1–1520–238–T–2

Change 5 GLOSSARY–7

GLOSSARY (cont)

INST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instrument

IPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inches per Second

IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Infrared

IRCM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Infrared Counter Measures

ITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Integrated Troubleshooting

IVD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indirect View Display

JAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Jammer

JTSN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Jettison

KNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Knots

L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Left

LB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pound

LAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lateral, Latitude

LCHR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Launcher

LDG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Landing

LEU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Electronics Unit

LH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Left–Hand

LIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Light

LMC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Linear Motion Compensation

LO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Low

LOAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lock–On After Launch

LOBL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lock–On Before Launch

LONG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Longitude

LOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Line of Sight

LRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Receiver Unit

LS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Missile Select

LT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Tracker/Light/Left

LTRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Tracker Receiver Unit

LTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Transceiver Unit

LVDT Linear Variable Differential Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

LVL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Level
TM 1–1520–238–T–2

GLOSSARY–8

GLOSSARY (cont)

LVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lever/Louver

M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Meter

MA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Missile Abort

MF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Missile Fail

MAINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance

MAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Malfunction

MAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual

MEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Memory

MFOV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Medium Field of View

MH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Missile Hangfire

MIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Microphone

MOC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance Operational Check

MON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Monitor

MRTU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multiplex Remote Terminal Unit

MOT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor

MSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Missile

MU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Missile Unlatched

MUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Multiplex

NA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not Applicable

NAV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Navigation

ND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nose Down

NF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No Fire

NFOV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Near Field of View

NG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gas Generator Speed

NGB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nose Gear Box

NR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rotor Speed

NOE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nap of the Earth
TM 1–1520–238–T–2

GLOSSARY–9

GLOSSARY (cont)

NOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nominal

NORM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normal

NP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Engine Torque Speed

NSA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Night Sensor Assembly

NU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nose Up

NVS FXD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Night Vision Sensor Fixed

OAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outside Air Sensor

ORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Optical Relay Tube

ORIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Override

OUTBD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outboard

OVERTEMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Over Temperature

OVRD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Override

OVSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overspeed

PAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pamphlet

PAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressurized Air System

PEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Penetration

PEU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PNVS Electronic Unit

PLRT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Polarity

PLT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pilot

PMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump

PMSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pilot Missile

PNL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Panel

PNVS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pilot Night Vision Sensor

POS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Position

PRF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pulse Repetition Frequency

PRI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Primary

PRKT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pilot Rocket
TM 1–1520–238–T–2

GLOSSARY–10 Change 5

GLOSSARY (cont)

PROG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Program

PSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pounds Per Square Inch

PSIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pounds Square Inch of Gage

PTO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Takeoff

PTT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Press to Talk

PWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power

PYLN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pylon

PYL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pylon

QTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Quantity

R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Right

RADALT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radar Altimeter

RAI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote Altitude Indicator

RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Random Access Memory

RCCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote Control Circuit Breaker

RCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Record

RCDR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recorder

RC/MC Rounds Counter/Magazine Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

RCVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Receiver

RCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocket Control Panel

RDR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radar

REC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Record

RECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rectifier

REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reference

REM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remaining

RES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reservoir/Reserve

RFAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Right Forward Avionics Bay

RH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Right–Hand

RHE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote HELLFIRE Electronics
TM 1–1520–238–T–2

GLOSSARY–11

GLOSSARY (cont)

RHI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote Heading Indicator

RICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rotor Anti–ice

RIPL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ripple

RKT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rocket

RMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Remote Magnetic Indicator

RNDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rounds

RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Revolutions Per Minute

RT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Right

RTA Receiver/Transmit Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

RTCL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reticule

RTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rotor

SAI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standby Attitude Indicator

SCU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stabilization Control Unit

SDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Signal Data Converter

SDCC Signal Data Converter Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

SDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Selectable Digital Display

SEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Secondary

SEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Select

SEU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sight Electronics Unit

SF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Station Fail

SIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Simulated

SNSR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sensor

SOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Solenoid

SPAD Shear Pin Activated Decoupler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

SPD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Speed

SRCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Search

SSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sight Surveying Unit

ST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Store Target/Stores
TM 1–1520–238–T–2

GLOSSARY–12 Change 5

GLOSSARY (cont)

STAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stabilator

STAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status

STBY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standby

STK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stick

SW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switch

SYM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Symbol

SYMGEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Symbol Generator

TADS Target Acquisition Designation Sight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

TBD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . To Be Determined

TCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turret Control Box

TEMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Temperature

TEU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TADS Electronics Unit

TF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tracker Fail

TGT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Turbine Gas Temperature

THROT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Throttle

TK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Talk/ Tank

TM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Manual

TMFL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Time of Flight

TNK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tank

TOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Time Of Day

TPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TADS Power Supply

TR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transformer Rectifier/ Tailrotor

TRIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trigger

TSEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Time Second

TST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Test

TV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Television

TWHL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tail Wheel

UHF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ultra High Frequency
TM 1–1520–238–T–2

Change 5 GLOSSARY–13/(GLOSSARY–14 blank)

GLOSSARY (cont)

UTIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Utility

UPDT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Update

VAB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Variable Action Button

VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Volts Alternating Current

VEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Velocity

VDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Volts Direct Current

VDU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Video Display Unit

VEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Velocity

VHF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Very High Frequency

VIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vibration

VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Video

VLV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve

VSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vertical Situation Indicator

VSWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage Standing Wave Ratio

WAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weapon Action Switch

WFOV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wide Field of View

WHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . White

WPN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Weapon

WPR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wiper

WRN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Warning

WSHLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Windshield

XDCR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transducer

XFEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Crossfeed

XFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer

XFMR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transformer

XFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transfer

XMSN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmission

XMTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transmitter

ZFOV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zoom Field of View
TM 1-1520-238-T-2

By Order of the Secretary of the Army:

Official:

GORDON R. SULLIVAN

General, United States Army

Chief of Staff

MILTON H. HAMILTON

Administrative Assistant to the

Secretary of the Army

02559

DISTRIBUTION:

To be distributed in accordance with DA Form 12-31-E, block no. 2949, requirements for TM 1-1520-238-T-2.

* U.S. GOVERNMENT PRINTING OFFlCE: 1992 - 654 - 122/60003
These are the instructions for sending an electronic 2028

The following format must be used if submitting an electronic 2028. The subject line must be exactly 

the same and all fields must be included; however, only the following fields are mandatory: 1, 3, 4, 5, 

6, 7, 8, 9, 10, 13, 15, 16, 17, and 27.

From: “Whomever” whomever@avma27.army.mil

To: 2028@redstone.army.mil

Subject DA Form 2028

1. From: Joe Smith

2. Unit: home

3. Address: 4300 Park

4. City: Hometown

5. St: MO

6. Zip: 77777

7. Date Sent: 19-OCT-93

8. Pub no: 55-2840-229-23

9. Pub Title: TM

10. Publication Date: 04-JUL-85

11. Change Number: 7

12. Submitter Rank: MSG

13. Submitter FName: Joe

14. Submitter MName: T

15. Submitter LName: Smith

16. Submitter Phone: 123-123-1234

17. Problem: 1

18. Page: 2

19. Paragraph: 3

20. Line: 4

21. NSN: 5

22. Reference: 6

23. Figure: 7

24. Table: 8

25. Item: 9

26. Total: 123

27. Text:

This is the text for the problem below line 27.
SOMETHING WRONG

FIGURE

30 December 1998 Troubleshooting Manual for AH-64

P.S.- - IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR

RECOMMENDATION, MAKE A CARBON COPY OF THIS

AND GIVE TO YOUR HEADQUARTERS.

PAGE

TM 1--1520--238-T-2

PARARECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS

WITH THIS PUBLICATION?

FROM: (PRINT YOUR UNIT’S COMPLETE ADDRESS)

DATE SENT

PUBLICATION NUMBER PUBLICATION DATE PUBLICATION TITLE

BE EXACT PIN--POINT WHERE IT IS

NO GRAPH NO

TABLE

NO

IN THIS SPACE, TELL WHAT IS WRONG

AND WHAT SHOULD BE DONE ABOUT IT:

PRINTED NAME, GRADE OR TITLE, AND TELEPHONE NUMBER SIGN HERE

DA 2028--2 FORM

1 JUL 79

PREVIOUS EDITIONS

ARE OBSOLETE.

DRSTS-M verprint2, 1 Nov 80

THEN . .JOT DOWN THE

DOPE ABOUT IT ON THIS

FORM, CAREFULLYTEAR

IT OUT, FOLD IT AND

DROP IT IN THE MAIL!

10 January 1999
PARA- FIGURE

THEN . .JOT DOWN THE

DOPE ABOUT IT ON THIS

FORM, CAREFULLYTEAR

IT OUT, FOLD IT AND

DROP IT IN THE MAIL!

P.S.- - IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR

RECOMMENDATION, MAKE A CARBON COPY OF THIS

AND GIVE TO YOUR HEADQUARTERS.

PAGE

RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS

WITH THIS PUBLICATION?

FROM: (PRINT YOUR UNIT’S COMPLETE ADDRESS)

DATE SENT

PUBLICATION NUMBER PUBLICATION DATE PUBLICATION TITLE

BE EXACT PIN--POINT WHERE IT IS

NO GRAPH NO

TABLE

NO

IN THIS SPACE, TELL WHAT IS WRONG

AND WHAT SHOULD BE DONE ABOUT IT:

PRINTED NAME, GRADE OR TITLE, AND TELEPHONE NUMBER SIGN HERE

DA 2028--2 FORM

1 JUL 79

PREVIOUS EDITIONS

ARE OBSOLETE.

DRSTS-M verprint2, 1 Nov 80

SOMETHING WRONG
REVERSE OF DA FORM 2028-2 Reverse of DRSTS-M Overprint 2,

1 Nov 80

TEAR ALONG PERFORATED LINE

DEPARTMENT OF THE ARMY

OFFICIAL BUSINESS

COMMANDER

U.S. ARMY AVIATION AND MISSILE COMMAND

ATTN: AMSAM-MMC-MA-NP

REDSTONE ARSENAL, AL 35898-5230

FOLD BACK

FILL IN YOUR

UNITS ADDRESS
PARA- FIGURE

THEN . .JOT DOWN THE

DOPE ABOUT IT ON THIS

FORM, CAREFULLYTEAR

IT OUT, FOLD IT AND

DROP IT IN THE MAIL!

P.S.- - IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR

RECOMMENDATION, MAKE A CARBON COPY OF THIS

AND GIVE TO YOUR HEADQUARTERS.

PAGE

RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS

WITH THIS PUBLICATION?

FROM: (PRINT YOUR UNIT’S COMPLETE ADDRESS)

DATE SENT

PUBLICATION NUMBER PUBLICATION DATE PUBLICATION TITLE

BE EXACT PIN--POINT WHERE IT IS

NO GRAPH NO

TABLE

NO

IN THIS SPACE, TELL WHAT IS WRONG

AND WHAT SHOULD BE DONE ABOUT IT:

PRINTED NAME, GRADE OR TITLE, AND TELEPHONE NUMBER SIGN HERE

DA 2028--2 FORM

1 JUL 79

PREVIOUS EDITIONS

ARE OBSOLETE.

DRSTS-M verprint2, 1 Nov 80

SOMETHING WRONG
REVERSE OF DA FORM 2028-2 Reverse of DRSTS-M Overprint 2,

1 Nov 80

TEAR ALONG PERFORATED LINE

DEPARTMENT OF THE ARMY

OFFICIAL BUSINESS

COMMANDER

U.S. ARMY AVIATION AND MISSILE COMMAND

ATTN: AMSAM-MMC-MA-NP

REDSTONE ARSENAL, AL 35898-5230

FOLD BACK

FILL IN YOUR

UNITS ADDRESS
PARA- FIGURE

THEN . .JOT DOWN THE

DOPE ABOUT IT ON THIS

FORM, CAREFULLYTEAR

IT OUT, FOLD IT AND

DROP IT IN THE MAIL!

P.S.- - IF YOUR OUTFIT WANTS TO KNOW ABOUT YOUR

RECOMMENDATION, MAKE A CARBON COPY OF THIS

AND GIVE TO YOUR HEADQUARTERS.

PAGE

RECOMMENDED CHANGES TO EQUIPMENT TECHNICAL PUBLICATIONS

WITH THIS PUBLICATION?

FROM: (PRINT YOUR UNIT’S COMPLETE ADDRESS)

DATE SENT

PUBLICATION NUMBER PUBLICATION DATE PUBLICATION TITLE

BE EXACT PIN--POINT WHERE IT IS

NO GRAPH NO

TABLE

NO

IN THIS SPACE, TELL WHAT IS WRONG

AND WHAT SHOULD BE DONE ABOUT IT:

PRINTED NAME, GRADE OR TITLE, AND TELEPHONE NUMBER SIGN HERE

DA 2028--2 FORM

1 JUL 79

PREVIOUS EDITIONS

ARE OBSOLETE.

DRSTS-M verprint2, 1 Nov 80

SOMETHING WRONG
REVERSE OF DA FORM 2028-2 Reverse of DRSTS-M Overprint 2,

1 Nov 80

TEAR ALONG PERFORATED LINE

DEPARTMENT OF THE ARMY

OFFICIAL BUSINESS

COMMANDER

U.S. ARMY AVIATION AND MISSILE COMMAND

ATTN: AMSAM-MMC-MA-NP

REDSTONE ARSENAL, AL 35898-5230

FOLD BACK

FILL IN YOUR

UNITS ADDRESS
The Metric System and Equivalents

Linear Measure Liquid Measure

1 centiliter = 10 milliters = .34 fl. ounce

1 centimeter = 10 millimeters = .39 inch 1 deciliter = 10 centiliters = 3.38 fl. ounces

1 decimeter = 10 centimeters = 3.94 inches 1 liter = 10 deciliters = 33.81 fl. ounces

1 meter = 10 decimeters = 39.37 inches 1 dekaliter = 10 liters = 2.64 gallons

1 dekameter = 10 meters = 32.8 feet 1 hectoliter = 10 dekaliters = 26.42 gallons

1 hectometer = 10 dekameters = 328.08 feet 1 kiloliter = 10 hectoliters = 264.18 gallons

1 kilometer = 10 hectometers = 3,280.8 feet

Square Measure

Weights

1 sq. centimeter = 100 sq. millimeters = .155 sq. inch

1 centigram = 10 milligrams = .15 grain 1 sq. decimeter = 100 sq. centimeters = 15.5 sq. inches

1 decigram = 10 centigrams = 1.54 grains 1 sq. meter (centare) = 100 sq. decimeters = 10.76 sq. feet

1 gram = 10 decigram = .035 ounce 1 sq. dekameter (are) = 100 sq. meters = 1,076.4 sq. feet

1 decagram = 10 grams = .35 ounce 1 sq. hectometer (hectare) = 100 sq. dekameters = 2.47 acres

1 hectogram = 10 decagrams = 3.52 ounces 1 sq. kilometer = 100 sq. hectometers = .386 sq. mile

1 kilogram = 10 hectograms = 2.2 pounds

1 quintal = 100 kilograms = 220.46 pounds Cubic Measure

1 metric ton = 10 quintals = 1.1 short tons

1 cu. centimeter = 1000 cu. millimeters = .06 cu. inch

1 cu. decimeter = 1000 cu. centimeters = 61.02 cu. inches

1 cu. meter = 1000 cu. decimeters = 35.31 cu. feet

Approximate Conversion Factors

To change To Multiply by To change To Multiply by

inches centimeters 2.540 ounce-inches Newton-meters .007062

feet meters .305 centimeters inches .394

yards meters .914 meters feet 3.280

miles kilometers 1.609 meters yards 1.094

square inches square centimeters 6.451 kilometers miles .621

square feet square meters .093 square centimeters square inches .155

square yards square meters .836 square meters square feet 10.764

square miles square kilometers 2.590 square meters square yards 1.196

acres square hectometers .405 square kilometers square miles .386

cubic feet cubic meters .028 square hectometers acres 2.471

cubic yards cubic meters .765 cubic meters cubic feet 35.315

fluid ounces milliliters 29,573 cubic meters cubic yards 1.308

pints liters .473 milliliters fluid ounces .034

quarts liters .946 liters pints 2.113

gallons liters 3.785 liters quarts 1.057

ounces grams 28.349 liters gallons .264

pounds kilograms .454 grams ounces .035

short tons metric tons .907 kilograms pounds 2.205

pound-feet Newton-meters 1.356 metric tons short tons 1.102

pound-inches Newton-meters .11296

Temperature (Exact)

°F Fahrenheit 5/9 (after Celsius °C

temperature subtracting 32) temperature
PIN: 045867-008