Service Bulletin

11 July 2014 340–27–120

Page 1 of 76

ATA CHAPTER: 27

FLIGHT CONTROLS – STALL WARNING/IDENTIFICATION SYSTEM – PROVISION FOR

AN IMPROVED STALL WARNING SYSTEM INCLUDING ICING REQUIREMENTS

Mod No. 3311, 3528

1. PLANNING INFORMATION

NOTE: Mod No. 3311 is provision for an improved Stall Warning System for Icing Condition.

NOTE: Mod No. 3528 is wire modification of the Engine Anti–icing System for A/C with ACT Engine Air

Intake, installed by SB340–71–053 (A/C 402–439) or by Option 243–2 (A/C 440–459).

NOTE: This Service Bulletin is divided in Part A (for A/C PRE SB340–27–097) and Part B (for A/C POST

SB340–27–097).

Part A give instructions for implementation of Mod no. 3311 and, if applicable, implementation of

Mod no. 3528.

Part B give instructions for implementation of Mod no. 3528 for A/C with Mod No. 3311 already

implemented (by SB340–27–097) and equipped with ACT Engine Air Intake (installed by

SB340–71–053 or by Option 243–2). (This includes A/C both PRE and POST SB340–27–116).

NOTE: For A/C with Mod No. 3311 already implemented (by SB340–27–097) and PRE SB340–71–053

and without Option 243–2, no further action is required. Only note the references to the new

activation Bulletins SB340–27–121 and SB340–27–122. Make a note in the Aircraft Log book that

this Service Bulletin SB340–27–120 is implemented. (This includes A/C both PRE and POST

SB340–27–116).

A. EFFECTIVITY

(1) Aircraft:

Aircraft Mfg. Serial No’s SAAB SF340A – 004–159.

Aircraft Mfg. Serial No’s SAAB 340B – 160–169, 171–341, 343–361, 364–366, 368–371,

373–378, 380–384, 386–394, 396–404, 406–408, 410–430, 432–454, 456–459.

NOTE: This Service Bulletin supersedes Service Bulletin No. SAAB 340–27–097.

NOTE: For A/C POST Service Bulletin SAAB 340–27–098 (Mod No 3312) or POST Service

Bulletin SAAB 340–27–099 (Mod No 3313), Service Bulletin SAAB 340–27–116 (Mod

No 3522) must be implemented before this Service Bulletin.

NOTE: This Service Bulletin is not applicable for A/C POST Service Bulletin SAAB340–27–075

(Mod No 2650) or 340–27–085 (Mod No 2650, 2859) (Ice Speed Push Button) as these

modifications (2650 and 2859) are only certified for aircraft operating in Canada.

FOR A/C With Basic Wingtip:

NOTE: Service Bulletin SAAB 340–27–121 (Mod No 3529) completes the installation and

activates the improved Stall Warning System for Icing Condition.

(A/C with Basic Wingtip are A/C PRE Service Bulletin SAAB340–57–026 and PRE

Service Bulletin SAAB340–57–030 and without Option 57:01)

FOR A/C With Extended Wingtip:

NOTE: Service Bulletin SAAB 340–27–122 (Mod No 3530) completes the installation and

activates the improved Stall Warning System for Icing Condition.

(A/C with Extended Wingtip are A/C POST Service Bulletin SAAB340–57–026 or POST

Service Bulletin SAAB340–57–030 or with Option 57:01 installed)
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11 July 2014 340–27–120

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FOR A/C ALL

(2) Spares: Not affected.

B. REASON

Part A

Natural stall has in few cases been experienced in icing condition before stall warning. In order to

prevent such unsafe condition a modified stall warning system has been developed.

Part A of this Service Bulletin installs a provision for a modified stall warning system that includes stall

warning curves that are optimized for operation in icing conditions. Part A also includes a wire

modification for applicable A/C with ACT Engine Air Intake.

Part B

During installation of SB340–27–097 (Mod No. 3311) in Saab 340B aircraft equipped with ACT Engine

Air Intake installed by SB340–71–053 (A/C 402–439) or by Option 243–2 (A/C 440–459) it has been

noted that there is a discrepancy in the wiring installation for these aircraft.

Part B of this Service Bulletin installs a wire modification to rectify the wiring for these aircraft.

C. DESCRIPTION

Part A of this Service Bulletin gives instructions for:

– removal of panels and units for access

– modification of the instrument panel 1VU

– installation of a illuminated push button switch at 1VU

– installation of a blank label, to temporarily cover (hide) the push button switch, at 1VU

– installation of a grounding block in the electrical center 305VU

– installation of a grounding block in the electrical center 306VU

– installation of a relay console in the electrical center 305VU

– installation of a relay console in the electrical center 306VU

– installation of relay sockets and relays in the electrical center 305VU

– installation of relay sockets and relays in the electrical center 306VU

– installation of resistors and diodes

– installation of clamp brackets

– relocation of wires

– installation of wires

– parking of wires (to make the new system inoperative)

– preparation for installation of a circuit breaker at 12VU

– parking of a circuit breaker at 12VU

– installation of removed access panels and units

– functional and operational tests.

Part B of this Service Bulletin gives instructions for:

– removal of access panels at 305/306VU and in the flight compartment

– modification of wiring in the electrical center 305/306VU and in the flight compartment

– installation of removed access panels

– operational test.
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D. COMPLIANCE

Mandatory

Saab recommends this Service Bulletin (SB) to be performed within 18 month from release of this SB.

This Service Bulletin is under EASA consideration for an Airworthiness Directive.

The final compliance terms will be set by the EASA Airworthiness Directive (AD) when issued.

E. APPROVAL

The technical content of this Service Bulletin is approved under the authority of DOA nr. EASA.21J.066.

F. MANPOWER

Part A

Estimated time to complete Part A of this Service Bulletin is:

2 persons required for some of the structural modifications

Total manhours: 70

Elapsed time (hours): 35

Labour cost at operators expense.

Part B

Estimated time to complete Part B of this Service Bulletin is:

1 person required

Total manhours: 8

Elapsed time (hours): 8

Labour cost at operators expense.

G. MATERIAL – COST AND AVAILABILITY

Part A

Price and availability for Mod Kit. No. SAAB 340–27–120–01 will be furnished on request.

Price and availability for Mod Kit. No. SAAB 340–27–120–02 will be furnished on request.

Part B

Price and availability for Mod Kit. No. SAAB 340–27–120–03 will be furnished on request.

H. TOOLING

Part A

FOR A/C 220–459

– Heat tool. AA.400 Super Heater Mark II, or equivalent (For the MTC connectors 91VP–P2,

92VP–P2).

FOR A/C ALL

– Heat gun

– Weight on wheels (WOW) switches operating tool, TDO 5–4650224.
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Crimp tool Positioner Insert tool Removal tool Used for

M22520/1–01 TH343 M81969/14–02 M81969/14–02 item 25:

35HL–J1, 

36HL–J1, 

37WH–J1, 

50WH–J1, 

7WHC–J1, 

42WW–J1, 

15GA–J1, 

21GA–J1

M22520/2–01 M22520/2–06 M81969/14–01 item 26:

3WHC–P1, 

3WH–P1, 

4WH–P1

M22520/1–01 TH441–1 BL J1276–1 J1276–1 item 27:

4WHC, 

5WHC, 

6WHC, 

9WHC, 

305VN–G, 

306VN–G, 

306VT–R

GMT232 item 28:

1VS–CA, 

1VS–CB, 

1VS–CC, 

160VS–A, 

201VS–VA,

203VS–VA,

292VS–A, 

293VS–A, 

292VS–B, 

293VS–B, 

292VS–C, 

293VS–C, 

305VS–GJ, 

305VS–GK, 

305VS–U, 

305VS–UA, 

306VS–FA, 

306VS–V, 

306VS–VA

GMT232 item 29:

306VS–VB

47387 item 30:

2WHC:L/1, 

36WH:L/1

47386 item 31:

2WHC, 

1HL, 

2HL
Service Bulletin

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FOR A/C 079–459

Crimp tool Positioner Insert tool Removal tool Used for

M22520/2–01 K817–2 CTA1160 item 32:

205VU–J17

M22520/2–01 K818–2 CTA1160 item 33:

205VU–P17

FOR A/C ALL

Part B

– Heat gun

Crimp tool Positioner Insert tool Removal tool Used for

M22520/1–01 TH343 M81969/14–02 M81969/14–02 item 25:

35HL–J1, 

36HL–J1

GMT232 item 28:

292VS–A, 

293VS–A, 

292VS–B, 

293VS–B, 

292VS–C, 

293VS–C

I. WEIGHT AND BALANCE

Part A

Weight change +2.15 lb / +0.98kg

Center of gravity STA 209.4

Change moment +4.50 lb.inch / +2.04 kg.inch

100

Part B

Not affected.

J. ELECTRICAL LOAD DATA

Not affected.

NOTE: The electrical load data will be affected post the activation Service Bulletins SAAB

340–27–121 (Mod No 3529) or SAAB 340–27–122 (Mod No 3530).

FOR A/C With Basic Wingtip:

Refer to Service Bulletin SAAB 340–27–121 (Mod No 3529).

(A/C with Basic Wingtip are A/C PRE Service Bulletin SAAB 340–57–026 and PRE Service Bulletin

SAAB 340–57–030 and without Option 57:01)

FOR A/C With Extended Wingtip:

Refer to Service Bulletin SAAB 340–27–122 (Mod No 3530).

(A/C with Extended Wingtip are A/C POST Service Bulletin SAAB 340–57–026 or POST Service

Bulletin SAAB 340–57–030 or with Option 57:01 installed)
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FOR A/C ALL

K. REFERENCES

Part A

Aircraft Maintenance Manual (AMM) 06–30–00 Description / Operation

12–00–00 Servicing

24–00–00 Maintenance practices

25–11–05 Maintenance practices

34–23–10 Removal / Installation

34–24–10 Removal / Installation

34–24–15 Removal / Installation

34–25–05 Maintenance practices

39–10–42 Maintenance practices

39–40–40 Maintenance practices

39–40–45 Maintenance practices

39–50–10 Maintenance practices

FOR A/C 079–459

Aircraft Maintenance Manual (AMM) 34–46–00–05 Adjustment / Test

34–46–25–04 Operational Test

34–46–30–04 Operational Test

34–46–35–04 Operational Test

34–60–00–05–2 Procedure 10

FOR A/C 220–459

Aircraft Maintenance Manual (AMM) 21–60–00–05 Adjustment / Test

24–20–00–05 Adjustment / Test

26–11–00–05 Adjustment / Test

Procedure 1

26–13–00–05 Adjustment / Test

28–22–15–05 Adjustment / Test

30–10–00–05 Adjustment / Test

31–50–00–05 Part 1 Aural Visual

36–11–00–02 Maintenance practices

36–23–00–05 Adjustment / Test

61–22–00–05 Adjustment / Test

71–00–00–05 Adjustment / Test

Procedure 1 and 2

FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

30–20–00–05 Adjustment / Test

FOR A/C ALL

Wiring Manual (WM) 20–00–00 Standard practices

20–20–15 Crimped sleeves

20–30–15 MTC Connectors
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Structural Repair Manual (SRM) 51–20–42 surface treatment

51–20–56 fillet sealing instructions

51–40–21 rivet removal/installation

51–40–40 fastener hole and drill

data

51–40–60 fastener spacing and

edge margin data

51–80–00 electrical bonding connection

Part B

Aircraft Maintenance Manual (AMM) 06–30–00 Description / Operation

12–00–00 Servicing

24–00–00 Maintenance practices

25–11–05 Maintenance practices

30–20–00–05 Adjustment / Test

Wiring Manual (WM) 20–00–00 Standard practices

20–20–15 Crimped sleeves

L. OTHER PUBLICATIONS AFFECTED

Part A

Aircraft Maintenance Manual (AMM)

Illustrated Parts Catalog (IPC)

Wiring Manual (WM)

Part B

Wiring Manual (WM)

2. ACCOMPLISHMENT INSTRUCTIONS Part A

A. JOB SET–UP Part A

(1) Before you start the SB, make sure:

– The modification kit contains the parts listed in the Service Bulletin

– The local supply items listed in the Service Bulletin are available

– The documentation is available

– The special tools are available.

(2) Make the aircraft safe for maintenance:

(a) Isolate the electrical power (Ref. AMM 24–00–00, maintenance practices).

(3) Open for access (Ref. AMM 06–30–00)

REF. FIG. 1

(a) Remove these exterior access panels: (Ref. AMM 06–30–00)

– 117AL (electrical center L/H)

– 118AR (electrical center R/H)

– 210AL (windshield wiper LH)

– 210AR (windshield wiper RH).
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(b) Remove the LH and the RH flight crew seat (Ref. AMM 25–11–05).

(c) At the avionics rack:

1 Remove the access panels 210AZ and 220AZ (Ref. AMM 06–30–00).

(d) In the flight compartment

1 Remove these access panels: (Ref. AMM 06–30–00)

– 117BZ (floor panel)

– 215BZ

– 215DZ

– 215FZ

– 215GZ

– 216BZ

– 216DZ

– 216FZ

– 216GZ

FOR A/C 004–219

– 215EZ remove if necessary for access to splice 293VS

– 216EZ remove if necessary for access to splice 292VS.

FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

– 210BZ

– 210CZ

– 210EZ

– 210GZ

– 215EZ

– 216EZ.

FOR A/C ALL

2 Loosen the screws that attach the access panel 215CZ to the structure and lower the

panel.

3 Loosen the screws that attach the access panel 216CZ to the structure and lower the

panel.

4 Loosen the screws that attach the circuit breaker panel 10VU to the structure and lower

the panel.

5 Loosen the screws that attach the circuit breaker panel 11VU to the structure and lower

the panel.

6 Loosen the screws that attach the circuit breaker panel 12VU to the structure and lower

the panel.

(e) At the instrument panels:

1 Remove the Multi Function Display (MFD 6FP) (Ref. AMM 34–25–05). (Only applicable

for A/C with MFD installed).

2 If necessary for access, remove the LH and the RH Electronic Attitude Director

Indicators (EADI 2FL and 2FM) (Ref. AMM 34–24–10).

3 If necessary for access, remove the LH and the RH Electronic Horizontal Situation

Indicators (EHSI 3FL and 3FM) (Ref. AMM 34–24–15).

4 If necessary for access, remove the Flight Status Panel (51VU) (Ref. AMM 39–50–10).

5 If necessary for access, remove the Standby Horizon Indicator (3FN) (Ref. AMM

34–23–10).
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(f) Keep the removed units in a safe place.

B. MODIFICATION / INSTALLATION Part A

(1) Structural modifications / installations

WARNING: MAKE SURE ALL THE ELECTRICAL COMPONENTS IN THE WORK AREA ARE

PROTECTED BEFORE YOU START THE STRUCTURAL WORK. SWARF AND

WORK DEBRIS CAN CAUSE DAMAGE OR SHORT–CIRCUITS. INJURY TO

PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE MATERIALS. YOU MUST

OBEY THE MANUFACTURERS HEALTH AND SAFETY INSTRUCTIONS. THE

CONSUMABLE MATERIALS CAN CAUSE INJURY OR DEATH TO PERSONS.

CAUTION: MAKE SURE BEFORE DRILLING AND CUTTING THAT YOU HAVE ENOUGH

CLEARANCE TO STRUCTURE AND ELECTRICAL CABLES BEHIND.

CUTTING TOOLS CAN CAUSE DAMAGE TO THE MATERIALS.

CAUTION: BE CAREFUL WHEN YOU DO STRUCTURAL MODIFICATIONS NEAR

ELECTRICAL HARNESSES AND/OR MECHANICAL COMPONENTS. MAKE

SURE THAT YOU COVER ELECTRICAL HARNESSES AND/OR MECHANICAL

COMPONENTS ADJACENT TO THE WORK AREA. CLEAN AND INSPECT THE

HARNESSES AND/OR THE MECHANICAL COMPONENTS WHEN THE

MODIFICATION IS COMPLETED. DAMAGES TO THE WIRES OR THE

MECHANICAL COMPONENTS CAN CAUSE SYSTEM MALFUNCTION.

NOTE: For more data on the methods used to do the structural modification, see the:

– SRM 51–20–42 for surface treatment

– SRM 51–20–56 for fillet sealing instructions

– SRM 51–40–21 for instructions on rivet removal/installation

– SRM 51–40–40 for fastener hole and drill data.

– SRM 51–40–60 for fastener spacing and edge margin data

– SRM 51–80–00 for instructions on electrical bonding connection.

(a) Modification of the instrument panel 1VU

REF. FIG. 2 and 17

1 At the instrument panel 1VU, mark the position of the cut out for the push button switch

3WHC. Refer to figure 2 and to figure 17, Sheet 2 of 5, view L.

WARNING: MAKE SURE ALL THE ELECTRICAL COMPONENTS IN THE WORK

AREA ARE PROTECTED BEFORE YOU START THE STRUCTURAL

WORK. SWARF AND WORK DEBRIS CAN CAUSE DAMAGE OR

SHORT–CIRCUITS. INJURY TO PERSONS AND DAMAGE TO

EQUIPMENT CAN OCCUR.

2 If necessary, remove units as applicable to be able to put the protective covers in a

correct position at the work area.

3 Use protective covers to protect the work area from debris.

CAUTION: MAKE SURE BEFORE DRILLING AND CUTTING THAT YOU HAVE

ENOUGH CLEARANCE TO STRUCTURE AND ELECTRICAL WIRES

BEHIND. CUTTING TOOLS CAN CAUSE DAMAGE TO THE

MATERIALS.

4 Carefully make the cut out in the instrument panel 1VU. Break all sharp edges.

5 Remove all tools, protective covers and equipment from the work area.

6 Use a vacuum cleaner and remove all debris. Make sure the work area is clean.
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(b) Installation of the grounding blocks (23)

REF. FIG. 17 Sheet 3 of 5

REF. FIG. 17 Sheet 5 of 5

1 In the electrical center 305VU:

REF. FIG. 17 Sheet 3 of 5 view AB, and Sheet 5 of 5 view R–R and view P

a Loosen and lower the applicable relay consoles to get access to the location for

the new grounding block 305VN–G (23). Refer to figure 17, Sheet 3 of 5, view AB.

b In the electrical center 305VU at STA 203.5, mark the position for installation of the

grounding block 305VN–G (23). Refer to figure 17, Sheet 5 of 5, view R–R and view

P.

WARNING: MAKE SURE ALL THE ELECTRICAL COMPONENTS IN THE

WORK AREA ARE PROTECTED BEFORE YOU START THE

STRUCTURAL WORK. SWARF AND WORK DEBRIS CAN

CAUSE DAMAGE OR SHORT–CIRCUITS. INJURY TO

PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

c Use protective covers to protect the work areas from debris.

CAUTION: MAKE SURE BEFORE DRILLING AND CUTTING THAT YOU

HAVE ENOUGH CLEARANCE TO STRUCTURE AND

ELECTRICAL CABLES BEHIND. CUTTING TOOLS CAN CAUSE

DAMAGE TO THE MATERIALS.

d Hold the grounding block (23) in position to the structure and drill the four holes in

accordance with SRM 51–80–00 (Bonding of ground connection).

e Plain deburr if necessary.

f Use the four rivets BJ4–6 to install the grounding block (23) to the structure in

accordance with SRM 51–80–00 (Bonding of ground connection). Refer to figure

17, Sheet 5 of 5, view P.

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE

MATERIALS. YOU MUST OBEY THE MANUFACTURERS

HEALTH AND SAFETY INSTRUCTIONS. THE CONSUMABLE

MATERIALS CAN CAUSE INJURY OR DEATH TO PERSONS.

g Apply fillet sealant PR 1422 B–1/2 (or equivalent) to the four rivets.

h Install the marker decal 305VN–G adjacent to the grounding block (23).

i Remove all tools, protective covers and equipment from the work area.

j Use a vacuum cleaner and remove all debris. Make sure the work area is clean.

2 In the electrical center 306VU:

REF. FIG. 17 Sheet 3 of 5 view AC, and Sheet 5 of 5 view T–T and view P

a Loosen and lower the applicable relay consoles to get access to the location for

the new grounding block 306VN–G (23). Refer to figure 17, Sheet 3 of 5, view AC.

b In the electrical center 306VU at STA 203.5, mark the position for installation of the

grounding block 306VN–G (23). Refer to figure 17 Sheet 5 of 5 view T–T and view

P.

WARNING: MAKE SURE ALL THE ELECTRICAL COMPONENTS IN THE

WORK AREA ARE PROTECTED BEFORE YOU START THE

STRUCTURAL WORK. SWARF AND WORK DEBRIS CAN

CAUSE DAMAGE OR SHORT–CIRCUITS. INJURY TO

PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

c Use protective covers to protect the work areas from debris.
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CAUTION: MAKE SURE BEFORE DRILLING AND CUTTING THAT YOU

HAVE ENOUGH CLEARANCE TO STRUCTURE AND

ELECTRICAL CABLES BEHIND. CUTTING TOOLS CAN CAUSE

DAMAGE TO THE MATERIALS.

d Hold the grounding block (23) in position to the structure and drill the four holes in

accordance with SRM 51–80–00 (Bonding of ground connection).

e Plain deburr if necessary.

f Use the four rivets BJ4–6 to install the grounding block (23) to the structure in

accordance with SRM 51–80–00 (Bonding of ground connection). Refer to figure

17, Sheet 5 of 5, view P.

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE

MATERIALS. YOU MUST OBEY THE MANUFACTURERS

HEALTH AND SAFETY INSTRUCTIONS. THE CONSUMABLE

MATERIALS CAN CAUSE INJURY OR DEATH TO PERSONS.

g Apply fillet sealant PR 1422 B–1/2 (or equivalent) to the four rivets.

h Install the marker decal 306VN–G adjacent to the grounding block (23).

i Remove all tools, protective covers and equipment from the work area.

j Use a vacuum cleaner and remove all debris. Make sure the work area is clean.

(c) Installation of the clamp brackets (22)

REF. FIG. 17 Sheet 5 of 5

1 In the electrical center 305VU:

REF. FIG. 17 Sheet 5 of 5 view R–R

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE

MATERIALS. YOU MUST OBEY THE MANUFACTURERS

HEALTH AND SAFETY INSTRUCTIONS. THE CONSUMABLE

MATERIALS CAN CAUSE INJURY OR DEATH TO PERSONS.

a In the electrical center 305VU at STA 203.5, use the cleaning agent MEK and clean

the area for the three clamp brackets (22).

b Attach the three clamp brackets (22). Use sealant PR 1422 B–1/2 or equivalent.

2 In the electrical center 306VU:

REF. FIG. 17 Sheet 5 of 5 view T–T

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE

MATERIALS. YOU MUST OBEY THE MANUFACTURERS

HEALTH AND SAFETY INSTRUCTIONS. THE CONSUMABLE

MATERIALS CAN CAUSE INJURY OR DEATH TO PERSONS.

a In the electrical center 306VU at STA 203.5, use the cleaning agent MEK and clean

the area for the three clamp brackets (22).

b Attach the three clamp brackets (22). Use sealant PR 1422 B–1/2 or equivalent.

(d) Prepare for installation of the relay consoles (1) and (6)

1 In the electrical center 305VU:

REF. FIG. 15

a Use a heat gun and install two pieces of edge string (5) on the relay console (1) in

accordance with FIG. 15 view B. (bench work).
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b Use four rivets BJ4–5 to install the panel fastener (4) to the bracket (2). Install in

accordance with FIG. 15 view A and D. (bench work).

c Use four rivets BJ4–5 to install the panel fastener (4) to the bracket (3). Install in

accordance with FIG. 15 view A and D. (bench work).

WARNING: MAKE SURE ALL THE ELECTRICAL COMPONENTS IN THE

WORK AREA ARE PROTECTED BEFORE YOU START THE

STRUCTURAL WORK. SWARF AND WORK DEBRIS CAN

CAUSE DAMAGE OR SHORT–CIRCUITS. INJURY TO

PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

d Use protective covers to protect the work area in the electrical center 305VU from

debris.

e In the electrical center 305VU, mark the position for the bracket (2) and the bracket

(3). Use the relay console (1) as a template. Refer to figure 15 view A.

NOTE: It is important to install the brackets (2 and 3) in the correct position in

accordance with the measurement given in figure 15 view A.

CAUTION: MAKE SURE BEFORE DRILLING AND CUTTING THAT YOU

HAVE ENOUGH CLEARANCE TO STRUCTURE AND

ELECTRICAL CABLES BEHIND. CUTTING TOOLS CAN CAUSE

DAMAGE TO THE MATERIALS.

f Drill and deburr the six holes for the brackets (2) and (3).

g Use six rivets BJ5–5 to install the bracket (2) and the bracket (3) to the structure.

Install in accordance with figure 15 view A.

FOR A/C With Option 231–1 (Portable Oxygen Bottle)

REF. FIG. 15 view C

WARNING: BE CAREFUL WHEN YOU USE THE CONSUMABLE

MATERIALS. YOU MUST OBEY THE MANUFACTURERS

HEALTH AND SAFETY INSTRUCTIONS. THE CONSUMABLE

MATERIALS CAN CAUSE INJURY OR DEATH TO PERSONS.

h In the electrical center 305VU, use the cleaning agent MEK and clean the flanges

of the reinforcement bracket for the portable oxygen bottle.

i Use a heat gun and install two pieces of edge string (5) on the flanges of the

reinforcement bracket in accordance with FIG. 15 view C.

FOR A/C ALL

j Temporarily install the relay console (1).

k Remove all tools, protective covers and equipment from the work area.

l Use a vacuum cleaner and remove all debris. Make sure the work area is clean.

2 In the electrical center 306VU:

REF. FIG. 16

a Use a heat gun and install three pieces of edge string (5) on the relay console (6)

in accordance with FIG. 16 view B. (bench work).

b Use four rivets BJ4–5 to install the panel fastener (4) to the bracket (2). Install in

accordance with FIG. 16 view A and C. (bench work).

c Use four rivets BJ4–5 to install the panel fastener (4) to the bracket (3). Install in

accordance with FIG. 16 view A and C. (bench work).
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WARNING: MAKE SURE ALL THE ELECTRICAL COMPONENTS IN THE

WORK AREA ARE PROTECTED BEFORE YOU START THE

STRUCTURAL WORK. SWARF AND WORK DEBRIS CAN

CAUSE DAMAGE OR SHORT–CIRCUITS. INJURY TO

PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.

d Use protective covers to protect the work area in the electrical center 306VU from

debris.

e In the electrical center 306VU, mark the position for the bracket (2) and the bracket

(3). Use the relay console (6) as a template. Refer to figure 16 view A.

NOTE: It is important to install the brackets (2 and 3) in the correct position in

accordance with the measurement given in figure 16 view A.

CAUTION: MAKE SURE BEFORE DRILLING AND CUTTING THAT YOU

HAVE ENOUGH CLEARANCE TO STRUCTURE AND

ELECTRICAL CABLES BEHIND. CUTTING TOOLS CAN CAUSE

DAMAGE TO THE MATERIALS.

f Drill and deburr the six holes for the brackets (2) and (3).

g Use six rivets BJ5–5 to install the bracket (2) and the bracket (3) to the structure.

Install in accordance with figure 16 view A.

h Temporarily install the relay console (6).

i Remove all tools, protective covers and equipment from the work area.

j Use a vacuum cleaner and remove all debris. Make sure the work area is clean.

(2) Electrical modifications / installations

CAUTION: BE CAREFUL WHEN YOU DO THE MODIFICATION OF THE HARNESS. MAKE

SURE THAT YOU DO NOT DAMAGE THE EXISTING WIRES WHEN NEW

WIRES ARE INSTALLED. CLEAN AND INSPECT THE AFFECTED HARNESS

WHEN THE MODIFICATION IS COMPLETED. DAMAGES TO THE WIRES CAN

CAUSE SYSTEM MALFUNCTION.

NOTE: All wiring changes are to be performed in accordance with the procedures in the WM

20–00–00.

(a) Installation of the relay sockets (19 and 21)

1 In the electrical center 305VU:

REF. FIG. 17 Sheet 4 of 5 view AD

a Remove the relay console (1) and put it on a suitable work bench.

b At the relay console (1), install the relay sockets 21GA–J1 (19) and 7WHC–J1 (19).

c At the rear side of the relay console (1), install the marker decal 21GA–J1 adjacent

to the relay socket 21GA–J1.

d At the rear side of the relay console (1), install the marker decal 7WHC–J1 adjacent

to the relay socket 7WHC–J1.

e At the relay console (1), install the relay socket 35HL–J1 (21).

f At the rear side of the relay console (1), install the marker decal 35HL–J1 adjacent

to the relay socket 35HL–J1.

g Install the relay console (1) in the electrical center 305VU.

NOTE: At installation of the wires to the relay sockets, (21GA–J1, 7WHC–J1 and

35HL–J1) make sure that you have sufficient length and routing of the

wires to be able to loosen and lower the relay console (1) for future

installations.
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2 In the electrical center 306VU:

REF. FIG. 17 Sheet 4 of 5 view AE

a Remove the relay console (6) and put it on a suitable work bench.

b At the relay console (6), install the relay socket 50WH–J1 (19).

c At the rear side of the relay console (6), install the marker decal 50WH–J1 adjacent

to the relay socket 50WH–J1.

d At the relay console (6), install the relay socket 36HL–J1 (21).

e At the rear side of the relay console (6), install the marker decal 36HL–J1 adjacent

to the relay socket 36HL–J1.

f Install the relay console (6) in the electrical center 306VU.

NOTE: At installation of the wires to the relay sockets, (50WH–J1 and 36HL–J1)

make sure that you have sufficient length and routing of the wires to be

able to loosen and lower the relay console (6) for future installations.

(b) Installation of the resistors (16) and the diodes (17)

REF. FIG. 17 Sheet 2 of 5 view E

REF. FIG. 17 Sheet 4 of 5 view D and view J

FOR A/C 200–459

1 At the terminal track 3VT (located at the area in front of the instrument panel 3VU),

remove and discard the dummy block (112) from the terminal track 3VT. Refer to figure

17 Sheet 2 of 5 view E.

FOR A/C ALL

2 At the terminal track 3VT (located at the area in front of the instrument panel 3VU), install

the terminal block diode 9WHC (17). Refer to figure 17 Sheet 2 of 5 view E.

NOTE: If the terminal track 3VT is to full to install 9WHC, remove and discard any

dummy block from 3VT to provide space for 9WHC. Refer to figure 17 Sheet

2 of 5 view E.

3 Install the marker decal 9WHC at the terminal block for 9WHC.

4 In the electrical center 305VU, at 305VT, install the terminal block diode 5WHC (17).

Refer to figure 17 Sheet 4 of 5 view J.

5 Install the marker decal 5WHC at the terminal block for 5WHC.

6 In the electrical center 306VU, at 306VT, install the terminal block resistor 4WHC (16).

Refer to figure 17 Sheet 4 of 5 view D.

7 Install the marker decal 4WHC at the terminal block for 4WHC.

8 In the electrical center 306VU, at 306VT, install the terminal block resistor 6WHC (16).

Refer to figure 17 Sheet 4 of 5 view D.

9 Install the marker decal 6WHC at the terminal block for 6WHC.

FOR A/C 079–459 PRE SB340–34–139

(c) Assembling and installation of the MTC–connectors 205VU–J17 (232) and 205VU–P17 (235)

REF. FIG. 17 Sheet 5 of 5 view S–S

NOTE: Do the final assembling and installation of the MTC–connectors 205VU–J17/–P17

in conjunction with installation of the wires, Ref step 2. C.(1) (j).
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NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

1 Install two dummy wafers (234) and the wafer for 205VU–J17 (233) into the receptacle

for 205VU–J17 (232).

2 Install the polarization pins in the key position DB (Ref. WM 20–30–15).

NOTE: The polarization pins are part of the receptacle (232).

3 Install the marker decal 205VU–J17 on the receptacle (232).

4 Install two dummy wafers (234) and the wafer for 205VU–P17 (236) into the plug housing

for 205VU–P17 (235).

5 Install the polarization pins in the key position DB (Ref. WM 20–30–15).

NOTE: The polarization pins are part of the plug housing (235).

6 Install the marker decal 205VU–P17 on the plug housing (235).

NOTE: Install and connect the connectors 205VU–J17/–P17 after installation of the

wires. Ref step 2. C.(1) (j).

7 Connect 205VU–P17 to 205VU–J17.

8 In the avionics rack, remove the two connector mounting screws NAS1101–06–30 and

the two washers that attach the connectors 205VU–J16/P16, –J15/P15, –J14/P14,

–J13/P13 to the plate, REF. FIG. 17 Sheet 5 of 5 view S–S.

9 Discard the two screws NAS1101–06–30, keep the washers.

10 Use the screws NAS1101–06–36 (237) and the two removed washers and install the

connectors 205VU–J17/P17 and 205VU–J16/P16, –J15/P15, –J14/P14, –J13/P13 to

the plate in the avionics rack.

FOR A/C ALL

(d) Installation of the push button switch 3WHC (15)

REF. FIG. 17 Sheet 2 of 5 view L

NOTE: In this Service Bulletin the push button switch is connected and installed, but then

covered by a blank label. Removal of the blank label and activation of the push

button switch is in the activation Service Bulletins SB340–27–121 and

SB340–27–122.

1 At the instrument panel 1VU, put the push button switch 3WHC (15) in position. Refer

to figure 17 Sheet 2 of 5 view L.

NOTE: Do not attach the push button switch at this step. (The push button switch is

attached to the instrument panel 1VU after connection of the wires. Step 2. C.

(3).

(e) Temporary installation of the circuit breaker 2WHC (14)

REF. FIG. 17 Sheet 3 of 5

NOTE: In this Service Bulletin, the circuit breaker is connected but then safetied, insulated,

parked and stowed. The final installation and activation of the circuit breaker is in

the activation Service Bulletins SB340–27–121 and SB340–27–122.

1 At the RH circuit breaker panel 12VU, temporary remove the cover from position S–28.

NOTE: The cover is reinstalled in step 2.C.(2) (Parking of the circuit breaker 2WHC).

2 At the RH circuit breaker panel 12VU, temporary install the circuit breaker 2WHC (14)

at position S–28 (Ref. AMM 39–10–42).
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NOTE: The temporary installation of the circuit breaker is to get the correct length on

the wires connected to the circuit breaker.

3 At the rear side of the RH circuit breaker panel 12VU, install the marker decal 2WHC

adjacent to the circuit breaker 2WHC.

(3) Relocation of wires (REF. FIG. 17)

CAUTION: BE CAREFUL WHEN YOU DO THE MODIFICATION OF THE HARNESS. MAKE

SURE THAT YOU DO NOT DAMAGE THE EXISTING WIRES WHEN NEW

WIRES ARE INSTALLED. CLEAN AND INSPECT THE AFFECTED HARNESS

WHEN THE MODIFICATION IS COMPLETED. DAMAGES TO THE WIRES CAN

CAUSE SYSTEM MALFUNCTION.

NOTE: All wiring changes are to be performed in accordance with the procedures in the WM

20–00–00.

NOTE: The color of the lacing cord on the A and the B wire bundles gives the harness class and

identification. The A harness is identified with white lacing cord and the B harness is

identified with red/black lacing cord.

FOR A/C 004–219

(a) Relocate these wires:

REF. FIG. 3 and 4

1 Find the splices 292VS and 293VS in the flight compartment left and right area, refer to

Fig 17 Sheet 1 of 5 view B and C.

Wire No: Class: From: Contact: To: Contact: Remarks:

HL13–24* A 292VS 36HL–J1:X2 item 25 * (+ 2500mm)

HL25–24* A 293VS 35HL–J1:X2 item 25 * (+ 3000mm)

HL64–24 A 292VS 292VS–A ** item 28 ** splice together with

HL89 and

HL3004

HL67–24 A 293VS 293VS–A *** item 28 *** splice together with

HL91 and

HL3001

HL89–24 A 292VS (discard 292VS)292VS–A   splice together with

HL64 and

HL3004

HL91–24 A 293VS (discard 293VS)293VS–A ** * *** splice together with

HL67 and

HL3001

NOTE: *) Extend the existing wires HL13–24 and HL25–24 with marked wires and

unmarked butt splices (28) supplied in the Material Kit.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

FOR A/C 220–401

(b) Relocate these wires:

REF. FIG. 5 and 6
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Wire No: Class: From: Contact: To: Contact: Remarks:

HL64–24* A 92VP–P2:B1 36HL–J1:X2 item 25 * (+ 2500mm)

HL67–24* A 91VP–P2:A20 35HL–J1:X2 item 25 * (+ 3000mm)

1 *) Extend the existing wires HL64–24 and HL67–24 with marked wires and unmarked

butt splices (28) supplied in the Material Kit.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

FOR A/C 402–439 PRE SB340–71–053, and for A/C 440–459 without Option 243–2. (A/C with COX Engine Air

Intake)

(c) Relocate these wires:

REF. FIG. 5 and 6

Wire No: Class: From: Contact: To: Contact: Remarks:

HL64–24* A 92VP–P2:B1 36HL–J1:X2 item 25 * (+ 2500mm)

HL67–24* A 91VP–P2:A20 35HL–J1:X2 item 25 * (+ 3000mm)

1 *) Extend the existing wires HL64–24 and HL67–24 with marked wires and unmarked

butt splices (28) supplied in the Material Kit.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

(d) Relocate these wires:

REF. FIG. 7 and 8

1 Find the splices 292VS and 293VS in the overhead area, refer to Fig 17 Sheet 2 of 5 view

Z. (Temporary loosen, but not disconnect, the applicable overhead panels).

Wire No: Class: From: Contact: To: Contact: Remarks:

HL91–24 A 293VS 293VS–C * * item 28 * * splice together with

HL3006 and

HL3008

HL67–24 A 293VS 293VS–B item 28

HL67–24 * A 91VP–P2:A20 * 35HL–J1:X2 item 25 * (+ 3000mm)

HL25–24 A 293VS (discard 293VS)293VS–B

HL89–24 A 292VS 292VS–C * * * item 28 ** * splice together with

HL3007 and

HL3009

HL64–24 A 292VS 292VS–B item 28

HL64–24* A 92VP–P2:B1 * 36HL–J1:X2 item 25 * (+ 2500mm)

HL13–24 A 292VS (discard 292VS)292VS–B
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2 *) Extend the existing wires HL64–24 and HL67–24 with marked wires and unmarked

butt splices (28) supplied in the Material Kit.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

FOR A/C ALL

(e) Relocate these wires:

REF. FIG. 9 and 10

Wire No: Class: From: Contact: To: Contact: Remarks:

WH311–24 A 306VT–R:H 306VS–FA ** item 28 ** splice together with

WH3000 and

WH3003

WH375–24* A 42WW–J1:C2 50WH–J1:C2 item 25 * (+1000mm)

WH376–24* A 42WW–J1:C3 50WH–J1:C3 item 25 * (+1000mm)

1 *) Extend the existing wires WH375–24 and WH376–24 with marked wires and

unmarked butt splices (28) supplied in the Material Kit.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

(f) Relocate these wires:

REF. FIG. 11 and 12

Wire No: Class: From: Contact: To: Contact: Remarks:

GA83–24 A 15GA–J1:X1 305VS–GJ * item 28 * splice together with

GA3002 and

GA3004

GA84–24 A 15GA–J1:X2 305VS–GK ** item 28 ** splice together with

GA3001 and

GA3003

FOR A/C ALL

C. INSTALLATION Part A

(1) Installation of wires (REF. FIG. 17)

CAUTION: BE CAREFUL WHEN YOU DO THE MODIFICATION OF THE HARNESS. MAKE

SURE THAT YOU DO NOT DAMAGE THE EXISTING WIRES WHEN NEW

WIRES ARE INSTALLED. CLEAN AND INSPECT THE AFFECTED HARNESS

WHEN THE MODIFICATION IS COMPLETED. DAMAGES TO THE WIRES CAN

CAUSE SYSTEM MALFUNCTION.

NOTE: All wiring changes are to be performed in accordance with the procedures in the WM

20–00–00.

NOTE: The color of the lacing cord on the A and the B wire bundles gives the harness class and

identification. The A harness is identified with white lacing cord and the B harness is

identified with red/black lacing cord.

FOR A/C 004–219

(a) Install these new wires:
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REF. FIG. 4

Wire No: Class: From: Contact: To: Contact: Remarks:

HL3001–24 A 293VS–A *** 35HL–J1:A2 item 25 *** splice together with

HL67 and

HL91

HL3004–24 A 292VS–A ** 36HL–J1:A2 item 25 ** splice together with

HL64 and

HL89

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

FOR A/C 220–401

(b) Install these new wires:

REF. FIG. 6

Wire No: Class: From: Contact: To: Contact: Remarks:

HL3006–24 A 35HL–J1:A2 item 25 91VP–P2:A20 item 34

HL3007–24 A 36HL–J1:A2 item 25 92VP–P2:B1 item 34

NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

FOR A/C 402–439 PRE SB340–71–053, and for A/C 440–459 without Option 243–2. (A/C with COX Engine Air

Intake)

(c) Install these new wires:

REF. FIG. 6

Wire No: Class: From: Contact: To: Contact: Remarks:

HL3006–24 A 35HL–J1:A2 item 25 91VP–P2:A20 item 34

HL3007–24 A 36HL–J1:A2 item 25 92VP–P2:B1 item 34

NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

(d) Install these new wires:

REF. FIG. 8

Wire No: Class: From: Contact: To: Contact: Remarks:

HL3006–24 A 91VP–P2:A20 item 34 293VS–C * * * * splice together with

HL91 and

HL3008

HL3008–24 A 35HL–J1:A2 item 25 293VS–C * * * * splice together with

HL91 and

HL3006
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Wire No: Class: From: Contact: To: Contact: Remarks:

HL3007–24 A 92VP–P2:B1 item 34 292VS–C * * * ** * splice together with

HL89 and

HL3009

HL3009–24 A 36HL–J1:A2 item 25 292VS–C * * * ** * splice together with

HL89 and

HL3007

FOR A/C ALL

(e) Install these new wires:

FOR A/C 004–219

REF. FIG. 4

FOR A/C 220–401

REF. FIG. 6

FOR A/C 402–439 PRE SB340–71–053, and for A/C 440–459 without Option 243–2. (A/C with COX Engine Air

Intake.)

REF. FIG. 6

FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

REF. FIG. 8

FOR A/C ALL

Wire No: Class: From: Contact: To: Contact: Remarks:

HL3000–24 A 1HL item 31 35HL–J1:X1 item 25

HL3002–24 A 305VN–G:4 item 27 35HL–J1:A1 item 25

HL3003–24 A 2HL item 31 36HL–J1:X1 item 25

HL3005–24 A 306VN–G:3 item 27 36HL–J1:A1 item 25

(f) Install these new wires:

REF. FIG. 10

Wire No: Class: From: Contact: To: Contact: Remarks:

WH3000–24 A 306VS–FA * 306VT–R:H item 27 * splice together with

WH3003 and

WH311

WH3003–24 A 306VS–FA * 50WH–J1:X1 item 25 * splice together with

WH3000 and

WH311

WH3004–24 A 42WW–J1:C2 item 25 50WH–J1:X2 item 25

WH3005–24 A 42WW–J1:C1 item 25 306VN–G:1 item 27

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.
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(g) Install these new wires:

REF. FIG. 12

Wire No: Class: From: Contact: To: Contact: Remarks:

GA3001–24 A 305VS–GK ** 21GA–J1:X2 item 25 ** splice together with

GA84 and

GA3003

GA3002–24 A 305VS–GJ * 21GA–J1:X1 item 25 * splice together with

GA83 and

GA3004

GA3003–24 A 305VS–GK ** 15GA–J1:X2 item 25 ** splice together with

GA84 and

GA3001

GA3004–24 A 305VS–GJ* 15GA–J1:X1 item 25 * splice together with

GA83 and

GA3002

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

(h) Install these new wires:

FOR A/C 004–078

REF. FIG. 13

FOR A/C 079–459

REF. FIG. 14

FOR A/C ALL

Wire No: Class: From: Contact: To: Contact: Remarks:

WHC1–24 A 1VS–CC item 28 3WHC–P1:7 item 26

WHC2–24 A 306VS–VA item 28 50WH–J1:B3 item 25

WHC3–24 A 306VS–VB item 29 50WH–J1:B2 item 25

WHC4–24 A 306VS–VA 4WHC–702 item 27

WHC5–24 A 306VS–VB 6WHC–701 item 27

WHC6–24 A 305VS–UA item 28 7WHC–J1:C2 item 25

WHC7–24 A 305VS–U item 28 7WHC–J1:X2 item 25

WHC8–24 A 305VS–U 7WHC–J1:A2 item 25

WHC9–24 A 1VS–CB item 28 3WHC–P1:8 item 26

WHC10–24 A 1VS–CB 3WHC–P1:9 item 26

WHC11–24 A 1VS–CA item 28 3WHC–P1:6 item 26

WHC12–24 A 1VS–CA 3WHC–P1:5 item 26

WHC13–24 A 1VS–CC 3WHC–P1:4 item 26

WHC14–24 A 1VS–CC 9WHC – item 27
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Wire No: Class: From: Contact: To: Contact: Remarks:

WHC15–24 A 1VS–CC 5WHC – item 27

WHC19–24 A 306VS–VB 4WHC:701 item 27

WHC20–24 A 306VS–V item 28 6WHC:702 item 27

WHC21–24 A 306VS–VB 50WH–J1:A2 item 25

WHC22–24 A 306VS–V 50WH–J1:A3 item 25

WHC23–24 A 306VN–G:2 item 27 36HL–J1:B1 item 25

WHC24–24 A 305VS–U 36HL–J1:B2 item 25

WHC25–24 A 305VS–U 35HL–J1:B2 item 25

WHC26–24 A 305VN–G:2 item 27 35HL–J1:B1 item 25

WHC27–24 A 305VS–UA 7WHC–J1:B2 item 25

WHC28–24 A 305VS–UA 7WHC–J1:A1 item 25

WHC29–24 A 305VN–G:1 item 27 37WH–J1:B2 item 25

WHC30–24 A 37WH–J1:B1 item 25 5WHC + item 27

WHC31–24 A 3WHC–P1:A2 item 26 21GA–J1:A2 item 25

WHC32–24 A 160VS–A item 28 3WHC–P1:A3 item 26

WHC33–24 A 1VS–CB 306VS–V

WHC34–24 A 1VS–CA 306VS–VA

WHC35–24 A 160VS–A 306VS–VB

WHC36–16 A 2WHC:L/1 item 30 36WH:911 * item 30 *

WHC37–24 A 160VS–A 2WHC item 31

WHC40–24 A 305VN–G:3 item 27 305VS–UA

WHC48–24 A 21GA–J1:A3 item 25 7WHC–J1:X1 item 25

NOTE: *) Install the terminal lug (30) to the wire, insulate the terminal lug with shrink sleeve

(supplied in the kit). Park and stow this end adjacent to the circuit breaker 36WH.

(36WH:L/1).

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

FOR A/C 004–078

(i) Install these new wires:

REF. FIG. 13

Wire No: Class: From: Contact: To: Contact: Remarks:

WHC16–24 A 7WHC–J1:C1 item 25 4WH–P1:911 ** item 26 **

WHC17–24 A 7WHC–J1:B1 item 25 3WH–P1:911 * item 26 *

WHC18–24 A 201VS–VA item 28 4WH–P1:911 ** item 26 **

WHC38–24 A 9WHC + item 27 201VS–VA

WHC39–24 A 201VS–VA 3WH–P1:911 * item 26 *

NOTE: *) Install the contact (26) to the wire, insulate the contact with shrink sleeve

(supplied in the kit). Park and stow this end adjacent to 3WH–P1.
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NOTE: **) Install the contact (26) to the wire, insulate the contact with shrink sleeve

(supplied in the kit). Park and stow this end adjacent to 4WH–P1.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

FOR A/C 079–459

(j) Install these new wires:

REF. FIG. 14

Wire No: Class: From: Contact: To: Contact: Remarks:

WHC16–24 A 7WHC–J1:C1 item 25 205VU–P17:A6 item 33

WHC17–24 A 7WHC–J1:B1 item 25 205VU–P17:A7 item 33

WHC38–24 A 9WHC + item 27 205VU–P17:A5 item 33

WHC41–24 A 203VS–VA item 28 205VU–J17:A5 item 32

WHC44–24 A 203VS–VA 4WH–P1:911 ** item 26 **

WHC45–24 A 205VU–J17:A6 item 32 4WH–P1:911 ** item 26 **

WHC46–24 A 203VS–VA 3WH–P1:911 * item 26 *

WHC47–24 A 205VU–J17:A7 item 32 3WH–P1:911 * item 26 *

NOTE: *) Install the contact (26) to the wire, insulate the contact with shrink sleeve

(supplied in the kit). Park and stow this end adjacent to 3WH–P1.

NOTE: **) Install the contact (26) to the wire, insulate the contact with shrink sleeve

(supplied in the kit). Park and stow this end adjacent to 4WH–P1.

NOTE: For maintenance practices of the MTC connectors, Ref. WM 20–30–15.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

FOR A/C ALL

(2) Parking of the circuit breaker 2WHC

REF. FIG. 17 Sheet 3 of 5 view K

(a) At the RH circuit breaker panel 12VU (position S–28), remove the circuit breaker 2WHC (14)

from the circuit breaker panel. (2WHC was temporarily installed at step 2. B.(2)(e). )

(b) At the RH circuit breaker panel 12VU (position S–28), reinstall the cover. (The cover was

temporarily removed at step 2. B.(2)(e). )

(c) Use a cable–tie to safety the circuit breaker 2WHC in open position.

(d) Use the shrink sleeve (supplied in the kit) to insulate the circuit breaker 2WHC.

(e) Park and stow the circuit breaker 2WHC to the adjacent harness below the circuit breaker

panel 12VU.

NOTE: The wire WHC36–16 (electrical power to 2WHC) is parked and stowed at the circuit

breaker 36WH (10VU).

(3) Deactivation of the push button switch 3WHC

REF. FIG. 17 Sheet 2 of 5 view L

(a) Attach the push button switch 3WHC (15) to the instrument panel 1VU.

(b) At the instrument panel 1VU, install the blank label (13) on top of the push button switch

3WHC to cover (hide) the push button switch 3WHC.

NOTE: The wire WHC36–16 (electrical power to 3WHC) is parked and stowed at the circuit

breaker 36WH (10VU).
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(4) Installation of relays (18 and 20)

(a) In the electrical center 305VU:

REF. FIG. 17 Sheet 4 of 5 view AD

1 At the relay console (1) at 7WHC–J1, install the relays 21GA (18) and 7WHC (18). (Ref.

AMM 39–40–45).

2 At the front side of the relay console (1), install the marker decal 21GA adjacent to the

relay 21GA.

3 At the front side of the relay console (1), install the marker decal 7WHC adjacent to the

relay 7WHC.

4 At the relay console (1) at 35HL–J1, install the relay 35HL (20). (Ref. AMM 39–40–40).

5 At the front side of the relay console (1), install the marker decal 35HL adjacent to the

relay 35HL.

6 At the relay console (1), use silicon tape and a strap to attach the wires to the relay

console (1). Refer to figure 17 Sheet 4 of 5 view AD.

NOTE: When you attach the wires to the relay console (1), make sure that you have

sufficient length and routing of the wires to be able to loosen and withdraw the

relay console (1) for future installations.

(b) In the electrical center 306VU:

REF. FIG. 17 Sheet 4 of 5 view AE

1 At the relay console (6) at 50WH–J1, install the relay 50WH (18). (Ref. AMM 39–40–45).

2 At the front side of the relay console (6), install the marker decal 50WH adjacent to the

relay 50WH.

3 At the relay console (6) at 36HL–J1, install the relay 36HL (20). (Ref. AMM 39–40–40).

4 At the front side of the relay console (6), install the marker decal 36HL adjacent to the

relay 36HL.

5 At the relay console (6), use silicon tape and a strap to attach the wires to the relay

console (6). Refer to figure 17 Sheet 4 of 5 view AE.

NOTE: When you attach the wires to the relay console (6), make sure that you have

sufficient length and routing of the wires to be able to loosen and withdraw the

relay console (6) for future installations.

(5) In the electrical center 306VU, install the convoluted tubing (7) on the harness to the existing relay

consoles in accordance with figure 17 Sheet 3 of 5 view H–H.

(6) Restore all affected wiring in accordance with the procedures in the wiring manual, Ref. WM

20–00–00.

(7) Install the marker plates and the marker decals as applicable at the related items and locations.

(8) Remove all the tools and equipment from the work area. Make sure the work area is clean.

(9) Installation of removed units

(a) Install the Multi Function Display (MFD 6FP) (Ref. AMM 34–25–05). (Only applicable for A/C

with MFD installed).

(b) If removed, install the LH and the RH Electronic Attitude Director Indicators (EADI 2FL and

2FM) (Ref. AMM 34–24–10).

(c) If removed, install the LH and the RH Electronic Horizontal Situation Indicators (EHSI 3FL

and 3FM) (Ref. AMM 34–24–15).
Service Bulletin

11 July 2014 340–27–120

Page 25 of 76

(d) If removed, install the Flight Status Panel (51VU) (Ref. AMM 39–50–10).

(e) If removed, install the Standby Horizon Indicator (3FN) (Ref. AMM 34–23–10).

(10) Close the access:

REF. FIG. 1

(a) Put the circuit breaker panel 10VU in position at the structure and tighten the screws.

(b) Put the circuit breaker panel 11VU in position at the structure and tighten the screws.

(c) Put the circuit breaker panel 12VU in position at the structure and tighten the screws.

(d) Hold the access panel 215CZ in position to the structure and tighten the screws.

(e) Hold the access panel 216CZ in position to the structure and tighten the screws.

(f) In the electrical center 305VU, hold the loosened relay consoles in position and tighten the

dzus fasteners.

(g) In the electrical center 306VU, hold the loosened relay consoles in position and tighten the

dzus fasteners.

(h) Install the exterior access panels:

– 117AL (electrical center L/H)

– 118AR (electrical center R/H)

– 210AL (windshield wiper LH)

– 210AR (windshield wiper RH).

(11) Install the LH and the RH flight crew seat (Ref. AMM 25–11–05).

(12) If applicable, attach the panels in the overhead if loosened.

(13) Remove all the tools and equipment from the work area. Make sure the work area is clean.

D. FUNCTIONAL AND OPERATIONAL TEST Part A

NOTE: Do the tests that follows in order to test the connection of the wires in the connectors and the

splices that has been opened during installation.

(1) Prepare the aircraft for test

(a) Supply the 28 VDC external power (Ref. AMM 12–00–00, servicing).

(b) On the overhead panel DC ELEC (32VU), set the switches L AVION, R AVION and ESS

AVION to ON.

(c) On the overhead panel AC/DC ELEC (33VU), set the switch INVERTER to ON (1 or 2).

If the AC/DC ELEC panel does not have the switch INVERTER, set the switch MAIN INV to

position ON.

FOR A/C 220–459

(2) Do the functional test of the aural and visual alerts (Ref. AMM 31–50–00–05, Part 1).

(3) Do this operational test of the AC Power–Inverter 1 :

ACTION RESULT

(a) On the overhead panel AC/DC

ELEC (33VU), set the switch

INVERTER (or MAIN INV) to OFF.

On the overhead panel AC/DC ELEC

(33VU), the indicator light INVERTER

comes on.

(b) On the overhead panel AC/DC

ELEC (33VU), set the switch

INVERTER to position 1. If the

AC/DC ELEC panel does not have

the switch INVERTER, set the

switch MAIN INV to ON.

On the overhead panel (33VU) the indicator

light INVERTER goes off.
Service Bulletin

11 July 2014 340–27–120

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FOR A/C ALL

(4) If the Standby Horizon Indicator was removed (for access), do the functional test of the Standby

Horizon Indicator (Ref. AMM 34–23–10–05).

(5) Do this operational test of the Engine Anti–Icing System:

ACTION RESULT

(a) On the overheadpanel ENGINE

(42VU), set the L/R ENGINE (Anti

Ice) to ON.

At the center instrument panel, on the flight

status panel (51VU), the blue advisory light

L/R ENG ANTI–ICE comes on.

(b) On the overheadpanel ENGINE

(42VU), set the L/R ENGINE (Anti

Ice) to OFF.

FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

(6) Do the Indication Lights and Power Relay Check for the Engine Air Intake (Ref AMM

30–20–00–05).

FOR A/C ALL

(7) Do this operational test of the relay function for the flight–idle stop (FI STOP) indicator light:

ACTION RESULT

(a) Set the aircraft in ground

configuration (L and R main

landing–gear down and locked,

weight on wheels).

(b) At the L and R main landing–gear,

install the WOW operating tool

(TDO 5–4650224) on the WOW

switches 5GA and 6GA, to set the

aircraft in flight position.

On the flight status panel 51VU, make sure

the blue flight–idle stop (FI STOP) indicator

light is not on.

(c) Remove the WOW operating tool

from the L main landing–gear

WOW switch 5GA.

On the flight status panel 51VU, make sure

the blue flight–idle stop (FI STOP) indicator

light comes on.

(d) Remove the WOW operating tool

from the R main landing–gear

WOW switch 6GA.

FOR A/C 079–459 POST Service Bulletin SAAB 340–34–139 (Mod No 3069)

(8) Operational test of the Terrain Awareness and Warning System (TAWS)

(a) Do the operational test of the TAWS (Ref. AMM 34–46–00–05).

(b) Do the operational test of the TERRAIN INHIBIT Switch (Ref. AMM 34–46–25–04).

(c) Do the operational test of the TERR AWARE and the G/S INHIBIT Pushbutton Switches (Ref.

AMM 34–46–30–04).

FOR A/C 079–459 POST Service Bulletin SAAB 340–34–166 (Mod No 3167)

(d) Do the operational test of the Steep Approach Pushbutton Switch (Ref. AMM 34–46–35–04)
Service Bulletin

11 July 2014 340–27–120

Page 27 of 76

FOR A/C 079–459 POST Service Bulletin SAAB 340–34–136 (Mod 3034)

(9) Do the operational test of the NPA/GPS System (Ref. AMM 34–60–00–05–2, Procedure 10)

FOR A/C 220–299

(10) Do this operational test of the Left Nacelle Air–Intake Indicating–Lamp:

ACTION RESULT

(a) On the overhead panel TEST 1

(19VU), set and hold the

LAMPS/UPR/LWR switch to

UPR.

On the overhead panel TEST 3 (54VU), the

L INTAKE lamp comes on.

(b) Release the LAMPS/UPR/LWR

switch.

FOR A/C 220–459

(11) Do this operational test of the Avionics–Rack Air–Distribution:

ACTION RESULT

(a) On the overhead panel DC ELEC

(32VU), set the switches L

AVION, R AVION and ESS

AVION to OFF.

(b) On the overhead panel DC ELEC

(32VU), set the ESS AVION

switch to ON.

The avionics ventilation fan (7HN) operates.

(Feel by hand at the avionics rack manifold

that the avionics ventilation fan moves air

through the avionics rack.)

(c) On the overhead panel DC ELEC

(32VU), set the ESS AVION

switch to OFF.

The avionics ventilation fan (7HN) stops.

(d) On the overhead panel DC ELEC

(32VU), set the switches L

AVION, R AVION and ESS

AVION to ON.

(12) Do the operational test of the Engine–Nacelle Fire–Detection System (Ref. AMM 26–11–00–05,

Procedure 1).

(13) Do the operational test of the Smoke Detectors (Ref. AMM 26–13–00–05).

(14) Do the operational test of the Bleed–Air–Duct Leak–Detection System (Ref. AMM 36–23–00–05).

(15) Do this operational test of the Fuel Quantity Indicators:

ACTION RESULT

(a) On the overhead panel TEST 1

(19VU), set and hold the FUEL

test switch to L.

On the center instrument panel and on the

wing refuel/defuel panel, the left FUEL QTY

indicators shows 1000 ± 50 lbs. (455 ± 23

kg).

(b) Release the FUEL test switch to

the center position.

The left FUEL QTY indicators shows the fuel

quantity in left tank.
Service Bulletin

11 July 2014 340–27–120

Page 28 of 76

(c) On the overhead panel TEST 1

(19VU), set and hold the FUEL

test switch to R.

On the center instrument panel and on the

wing refuel/defuel panel, the right FUEL

QTY indicators shows 1000 ± 50 lbs. (455 ±

23 kg).

(d) Release the FUEL test switch to

the center position.

The right FUEL QTY indicators shows the

fuel quantity in right tank.

(16) Do the operational test of the Fuel–Distribution Standby DC Boost–Pump (Ref. AMM

28–22–15–05). Do the test for both the LH and the RH side.

(17) Do this operational test of the Flap Control System:

WARNING: BE CAREFUL WHEN YOU OPERATE THE FLAPS. MAKE SURE THAT

PERSONS ARE NOT NEAR THE FLAPS WHEN THE FLAPS OPERATES. THE

FLAPS CAN CAUSE INJURY TO PERSONS.

CAUTION: BE CAREFUL WHEN YOU OPERATE THE FLAPS. MAKE SURE THE AREA

BELOW THE FLAPS IS CLEAR. DAMAGE TO THE FLAPS CAN OCCUR WHEN

YOU LOWER THE FLAPS.

ACTION RESULT

(a) On the center pedestal, make

sure the flap control lever is in the

UP position.

(b) On the center pedestal, at panel

27VU, set the hydraulic pump

switch to OVRD.

The two pointers on the flap position

indicator shows 0°.

(c) Move the flap control lever to the

15° position.

The two pointers on the flap position

indicator shows 15°.

(d) On the overhead panel TEST 1

(19VU), press and hold the

FLAPS test switch.

On the TEST 1 panel (19VU), the FLAPS

test light come on.

(e) Continue to press and hold the

FLAPS test switch and move the

flap control lever to the 20°

position.

– The two pointers on the flap position

indicators do not respond

– On the CWP, the FLAPS caution light

start to flash

– On the TEST 1 panel (19VU), the FLAPS

test light start to flash.

(f) Continue to press and hold the

FLAPS test switch and move the

flap control lever to the UP

position.

– The two pointers on the flap position

indicators do not respond

– On the CWP, the FLAPS caution light

start to flash

– On the TEST 1 panel (19VU), the FLAPS

test light start to flash.

(g) On the overhead panel TEST 1

(19VU), release the FLAPS test

switch.

– The two pointers on the flap position

indicator shows 0°

– On the CWP, the FLAPS caution light

goes off

– On the TEST 1 panel (19VU), the FLAPS

test light goes off.
Service Bulletin

11 July 2014 340–27–120

Page 29 of 76

NOTE: Do the tests that follows with the engines running.

(18) Start the engines (Ref. AMM 71–00–00–05).

(19) Do the operational test of the AC generating and distribution system (Ref. AMM 24–20–00–05).

(20) Do this operational test of the Pitot/Static Heating:

(a) On the RH circuit breaker panel 12VU, open these circuit breakers

LABEL POS C/B

PROBE HEAT / STBY PITOT / PWR S–26 3HG

PROBE HEAT / STBY PITOT / CONTROL S–27 7HG

ACTION RESULT

(b) On the overhead panel ICE

PROTECTION (21VU), make

sure the STBY PITOT switch is

set to OFF.

On the overhead panel, ICE PROTECTION

(21VU), the STBY PITOT lamp comes on.

NOTE: If you need to reset the lamp, push

in one of the MASTER CAUTION

switches on the LH/RH

glareshield panel.

(c) On the RH circuit breaker panel 12VU, close these circuit breakers

LABEL POS C/B

PROBE HEAT / STBY PITOT / PWR S–26 3HG

PROBE HEAT / STBY PITOT / CONTROL S–27 7HG

ACTION RESULT

(d) On the overhead panel ICE

PROTECTION (21VU), set the

STBY PITOT switch to ON.

On the overhead panel ICE PROTECTION

21VU, the indication lamp STBY PITOT

goes off.

(21) Do this operational test of the Propellers De–icing System:

ACTION RESULT

(a) On the overhead panel ICE

PROTECTION (21VU), set the R

PROP switch to MAX.

– At the center instrument panel, on the

flight status panel (51VU), the R PROP

DE–ICE lamp comes on

– On the overhead panel ICE

PROTECTION (21VU), make sure the R

PROP warning lamp is off.

(b) On the RH circuit breaker panel

12VU, open the R PROPELLER/

PWR ØC circuit breaker (P–23)

for approximately two minutes.

– On the central warning panel 3WW, the

amber ICE PROT warning lamp comes

on.

– On the overhead panel ICE

PROTECTION (21VU), the R PROP

warning lamp comes on.

(c) On the RH circuit breaker panel

12VU, close the R PROPELLER/

PWR ØC circuit breaker (P–23).
Service Bulletin

11 July 2014 340–27–120

Page 30 of 76

ACTION RESULT

(d) On the overhead panel ICE

PROTECTION (21VU), set the R

PROP switch to OFF, and then

set the switch to MAX.

– On the central warning panel 3WW, the

amber ICE PROT warning lamp goes off

– On the overhead panel ICE

PROTECTION (21VU), the R PROP

warning lamp goes off

– On the flight status panel (51VU), the R

PROP DE–ICE lamp 36HJ comes on.

(e) On then overhead panel ICE

PROTECTION (21VU), set the R

PROP switch to OFF.

On the flight status panel (51VU), the R

PROP DE–ICE lamp goes off.

(f) On the overhead panel ICE

PROTECTION (21VU), set the

STBY PITOT switch to OFF.

(22) Do the operational test of the Temperature Control System (Ref. AMM 21–60–00–05).

(23) Do the operational test of the Pneumatic Air–Supply Distribution System (Ref. AMM

36–11–00–02).

(24) Do the operational test of the Airfoil De–Icing System (Ref. AMM 30–10–00–05).

(25) Do the operational test of the Autocoarsen System (Ref. AMM 61–22–00–05).

(26) Shut down the engines (Ref. AMM 71–00–00).

FOR A/C ALL

(27) Remove the electrical power (Ref. AMM 12–00–00).

(28) Remove all the tools and equipment from the work area. Make sure the work area is clean.

E. JOB CLOSE–UP Part A

(1) Remove all the tools and equipment from the work area. Make sure the work area is clean.

(2) Close the access:

REF. FIG. 1

(a) At the avionics rack, install the access panels 210AZ and 220AZ.

(b) In the flight compartment:

1 Install these access panels:

– 117BZ (floor panel)

– 215BZ

– 215DZ

– 215FZ

– 215GZ

– 216BZ

– 216DZ

– 216FZ

– 216GZ.

FOR A/C 004–219

2 If removed, install these access panels:

– 215EZ

– 216EZ.
Service Bulletin

11 July 2014 340–27–120

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FOR A/C 402–439 POST SB340–71–053, and for A/C 440–459 with Option 243–2 installed. (A/C with ACT

Engine Air Intake)

3 Install these access panels:

– 210BZ

– 210CZ

– 210EZ

– 210GZ

– 215EZ

– 216EZ.

FOR A/C ALL

(3) Remove all the tools and equipment from the work area. Make sure the work area is clean.

3. ACCOMPLISHMENT INSTRUCTIONS Part B

A. JOB SET–UP Part B

(1) Before you start, make sure:

– The modification kit contains the parts listed in the Service Bulletin

– The local supply items listed in the Service Bulletin are available

– The documentation is available

– The special tools are available.

(2) Make the aircraft safe for maintenance:

(a) Isolate the electrical power (Ref. AMM 24–00–00, maintenance practices).

(3) Open for access (Ref. AMM 06–30–00)

REF. FIG. 1

(a) Remove these exterior access panels: (Ref. AMM 06–30–00)

– 117AL (electrical center L/H)

– 118AR (electrical center R/H).

(b) Remove the LH and the RH flight crew seat (Ref. AMM 25–11–05).

(c) In the flight compartment

1 Remove these access panels: (Ref. AMM 06–30–00)

– 210BZ

– 210CZ

– 210EZ

– 210GZ

– 215DZ

– 216DZ

– 215EZ

– 216EZ.

B. MODIFICATION / INSTALLATION Part B

(1) Electrical modifications / installations

CAUTION: BE CAREFUL WHEN YOU DO THE MODIFICATION OF THE HARNESS. MAKE

SURE THAT YOU DO NOT DAMAGE THE EXISTING WIRES WHEN NEW

WIRES ARE INSTALLED. CLEAN AND INSPECT THE AFFECTED HARNESS

WHEN THE MODIFICATION IS COMPLETED. DAMAGES TO THE WIRES CAN

CAUSE SYSTEM MALFUNCTION.

NOTE: All wiring changes are to be performed in accordance with the procedures in the WM

20–00–00.
Service Bulletin

11 July 2014 340–27–120

Page 32 of 76

(a) Relocate these wires:

REF. FIG.18 and 19

1 Find the splices 292VS and 293VS in the overhead area, refer to Fig 17 Sheet 2 of 5 view

Z. (Temporary loosen, but not disconnect, applicable overhead panels).

Wire No: Class: From: Contact: To: Contact: Remarks:

HL13–24 A 292VS 292VS–B item 28

HL64–24 A 292VS 292VS–B

HL89–24 A 292VS (discard 292VS)292VS–C * * item 28 ** splice together with

HL3007 and

HL3009

HL3007–24* A 36HL–J1:A2 292VS–C * (+ 2500mm)

HL25–24 A 293VS 293VS–B item 28

HL67–24 A 293VS 293VS–B

HL91–24 A 293VS (discard 293VS)293VS–C * * * item 28 ** * splice together with

HL3006 and

HL3008

HL3006–24* A 35HL–J1:A2 293VS–C * (+ 2500mm)

2 *) If applicable, extend the existing wires HL3006–24 and HL3007–24 with marked wires

and unmarked butt splices (28) supplied in the Material Kit.

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

(b) Install these new wires:

REF. FIG. 19

Wire No: Class: From: Contact: To: Contact: Remarks:

HL3009–24 A 36HL–J1:A2 item 25 292VS–C * * ** splice together with

HL89 and

HL3007

HL3008–24 A 35HL–J1:A2 item 25 293VS–C * * * ** * splice together with

HL91 and

HL3006

NOTE: For maintenance practices of the butt splices, Ref. WM 20–20–15.

(c) Restore all affected wiring in accordance with the procedures in the wiring manual, Ref. WM

20–00–00.

(d) Remove all the tools and equipment from the work area. Make sure the work area is clean.

C. OPERATIONAL TEST Part B

(1) Prepare the aircraft for test

(a) Supply the 28 VDC external power (Ref. AMM 12–00–00, servicing).

(b) On the overhead panel DC ELEC (32VU), set the switches L AVION, R AVION and ESS

AVION to ON.
Service Bulletin

11 July 2014 340–27–120

Page 33 of 76

(c) On the overhead panel AC/DC ELEC (33VU), set the switch INVERTER to ON (1 or 2).

If the AC/DC ELEC panel does not have the switch INVERTER, set the switch MAIN INV to

position ON.

(2) Do this operational test of the Engine Anti–Icing System:

ACTION RESULT

(a) On the overheadpanel ENGINE

(42VU), set the L/R ENGINE (Anti

Ice) to ON.

At the center instrument panel, on the flight

status panel (51VU), the blue advisory light

L/R ENG ANTI–ICE comes on.

(b) On the overheadpanel ENGINE

(42VU), set the L/R ENGINE (Anti

Ice) to OFF.

(3) Do the Indication Lights and Power Relay Check for the Engine Air Intake (Ref AMM

30–20–00–05).

(4) Remove the electrical power (Ref. AMM 12–00–00).

D. JOB CLOSE–UP Part B

(1) Remove all the tools and equipment from the work area. Make sure the work area is clean.

(2) Close the access:

REF. FIG. 1

(a) In the flight compartment:

1 Install these access panels:

– 210BZ

– 210CZ

– 210EZ

– 210GZ

– 215DZ

– 216DZ

– 215EZ

– 216EZ.

(b) Install the LH and the RH flight crew seat (Ref. AMM 25–11–05).

(c) Install these exterior access panels: (Ref. AMM 06–30–00)

– 117AL (electrical center L/H)

– 118AR (electrical center R/H).

(3) Remove all the tools and equipment from the work area. Make sure the work area is clean.
Service Bulletin

11 July 2014 340–27–120

Page 34 of 76

4. MATERIAL INFORMATION PART A

A. Modification Kit No SAAB 340–27–120–01 contains: (Part A)

NOTE: The Modification Kit contains the items for several configurations of the Saab 340. 

Some items (wires and contacts) are only applicable for some of the aircraft. 

Where an item has a specific effectivity it is given in the Remarks column.

Items without aircraft effectivity listed in the Remarks column are effective for all aircraft.

Item Part Number Qty Nomenclature Designation Remarks

1 7239305–823 1 Relay console – At 305VU

2 7239305–091 2 Bracket – For the relay

consoles (1) and

(6)

3 7239305–092 2 Bracket – For the relay

consoles (1) and

(6)

4 7239224–103 4 Panel fastener – For the relay

consoles (1) and

(6)

5 TPEM–7 700mm Edge string – For the relay

consoles (1) and

(6) (and for the

optional oxygen

bottle)

6 7239305–824 1 Relay console – At 306VU

7 HCTE–1250–0–

BLACK

100MM Convoluted tubing – At 306VU

– MS20470AD4–5 16 Rivet BJ4–5 – To attach the

panel fasteners

(4) to the brackets (2) and (3)

– MS20470AD5–5 12 Rivet BJ5–5 – To attach the

brackets (2) and

(3) to structure

– MS20470AD4–6 8 Rivet BJ4–6 – To attach

305VN–G and

306VN–G (23)

13 7292183–009 1 Blank label – At 1VU, to cover

3WHC

14 MS3320–5 

O/T 

483–96–TC–K14–5

1 Circuit breaker 2WHC At 12VU

15 4668–59 1 Illuminated pushbutton switch3WHC At 1VU

16 7239791–512 2 Term block resistor 4WHC, 6WHC At 306VT
Service Bulletin

11 July 2014 340–27–120

Page 35 of 76

Item Part Number Qty Nomenclature Designation Remarks

17 YHLZD–8 2 T.B. Diode 5WHC, 9WHC At 305VU and

3VT

18 M83536–6–022L

O/T

M83536–6–022M

O/T

16303–804–G3N–2

YE3 

O/T 

M6106–28–023 

O/T 

16303–804–G3N–2

YEE0

3 Relay 21GA, 7WHC,

50WH

At 305VU and

306VU

19 RSE120060

O/T

S220A4A0 

O/T

SE405–30

O/T

SE405A–01–04–01

3 Relay socket 21GA–J1,

7WHC–J1,

50WH–J1

At 305VU and

306VU

20 M83536–2–024L

O/T

M83536–2–024M

O/T

M6106–27–023

O/T

16303–803–G3B–2Y

E3

16303–803–G3B–2E

E0

2 Relay 35HL, 36HL At 305VU and

306VU

21 RSE120050

O/T

S210A4A0

O/T 

SE205–21

O/T

SE205A–01–04–01

2 Relay socket 35HL–J1,

36HL–J1

At 305VU and

306VU

22 TY3–G1

O/T

151–21319

6 Clamp bracket – At 305VU and

306VU

23 YHLZG–16–1 2 Grounding block 305VN–G, 

306VN–G

At 305VU and

306VU
Service Bulletin

11 July 2014 340–27–120

Page 36 of 76

Item Part Number Qty Nomenclature Designation Remarks

25 M39029/101–553 44 Contact 15GA–J1,

21GA–J1,

35HL–J1, 

36HL–J1, 

37WH–J1, 

50WH–J1, 

7WHC–J1, 

42WW–J1

26 M39029/57–354 16 Contact 3WHC–P1, 

3WH–P1, 

4WH–P1

27 YHMM22–2DB8 17 Contact 4WHC, 

5WHC, 

6WHC, 

9WHC, 

305VN–G, 

306VN–G, 

306VT–R

28 D–436–36 22 Butt splice 201VS–VA, 

203VS–VA, 

292VS–A, 

293VS–A, 

292VS–B, 

293VS–B, 

292VS–C, 

293VS–C,

1VS–CA, 

1VS–CB, 

1VS–CC, 

160VS–A, 

305VS–GJ,

305VS–GK,

305VS–U, 

305VS–UA, 

306VS–FA, 

306VS–V, 

306VS–VA, 

Unmarked

splices qty. 4

201VS–VA valid

for A/C 004–078. 

203VS–VA valid

for A/C 079–459.

292VS–A and

293VS–A valid

for A/C004–219. 

292VS–B & –C

and 

293VS–B & –C 

valid for A/C

POST

SB340–71–053

or with Option

243–2 installed.

(Unmarked

splices qty. 4 to

extend wires

WH375 &

WH376 and

HL13 & HL25 or

HL64 & HL67)

29 D–436–37 1 Butt splice 306VS–VB

30 MS25036–153 2 Terminal lug 2WHC:L/1, 

36WH:L/1
Service Bulletin

11 July 2014 340–27–120

Page 37 of 76

Item Part Number Qty Nomenclature Designation Remarks

31 MS25036–146 3 Terminal lug 2WHC, 

1HL, 

2HL

32 CTA–0166 3 MTC–Contact 205VU–J17 Valid for A/C

079–459

33 CTA–0165 3 MTC–Contact 205VU–P17 Valid for A/C

079–459

34 CTA–0036 1 Butt solder sleeve kit 91VP–P2, 

92VP–P2

Valid for A/C

220–459

– RNF–100 3/16 1 Marker sleeve

(GA)

305VS–GJ

– RNF–100 3/16 1 Marker sleeve

(GA)

305VS–GK

– RNF–100 3/16 1 Marker sleeve

(WH)

306VS–FA

– RNF–100 3/16 1 Marker sleeve

(HL)

292VS–A Valid for A/C

004–219

– RNF–100 3/16 1 Marker sleeve

(HL)

293VS–A Valid for A/C

004–219

– RNF–100 3/16 1 Marker sleeve

(HL)

292VS–B Valid for A/C

402–439 POST

SB340–71–053

and for A/C

440–459 with

Option 243–2 installed.

– RNF–100 3/16 1 Marker sleeve

(HL)

293VS–B Valid for A/C

402–439 POST

SB340–71–053

and for A/C

440–459 with

Option 243–2 installed.

– RNF–100 3/16 1 Marker sleeve

(HL)

292VS–C Valid for A/C

402–439 POST

SB340–71–053

and for A/C

440–459 with

Option 243–2 installed.
Service Bulletin

11 July 2014 340–27–120

Page 38 of 76

Item Part Number Qty Nomenclature Designation Remarks

– RNF–100 3/16 1 Marker sleeve

(HL)

293VS–C Valid for A/C

402–439 POST

SB340–71–053

and for A/C

440–459 with

Option 243–2 installed.

– RNF–100 3/16 1 Marker sleeve

(WHC)

201VS–VA Valid for A/C

004–078

– RNF–100 3/16 1 Marker sleeve

(WHC)

203VS–VA Valid for A/C

079–459

– RNF–100 3/16 1 Marker sleeve

(WHC)

1VS–CA

– RNF–100 3/16 1 Marker sleeve

(WHC)

1VS–CB

– RNF–100 3/16 1 Marker sleeve

(WHC)

1VS–CC

– RNF–100 3/16 1 Marker sleeve

(WHC)

160VS–A

– RNF–100 3/16 1 Marker sleeve

(WHC)

305VS–U

– RNF–100 3/16 1 Marker sleeve

(WHC)

305VS–UA

– RNF–100 3/16 1 Marker sleeve

(WHC)

306VS–V

– RNF–100 3/16 1 Marker sleeve

(WHC)

306VS–VA

– RNF–100 3/16 1 Marker sleeve

(WHC)

306VS–VB

– RNF–100 3/16 200mm Shrinkable tubing – At the 4 unmarked splices.

– RNF–100 1/8 200mm Shrinkable tubing – For parking of

contacts at

3WH–P1 and

4WH–P1.

– RNF–100 1/4 100mm Shrinkable tubing – For parking of

terminal lug at

C/B 36WH.

– RNF–100 1 200mm Shrinkable tubing – For parking of

C/B 2WHC.

– – 1 Marker decal 21GA

– – 2 Marker decal 2WHC
Service Bulletin

11 July 2014 340–27–120

Page 39 of 76

Item Part Number Qty Nomenclature Designation Remarks

– – 1 Marker decal 3WHC

– – 1 Marker decal 4WHC

– – 1 Marker decal 5WHC

– – 1 Marker decal 6WHC

– – 1 Marker decal 7WHC

– – 1 Marker decal 9WHC

– – 1 Marker decal 1HL

– – 1 Marker decal 2HL

– – 1 Marker decal 35HL

– – 1 Marker decal 36HL

– – 1 Marker decal 36WH

– – 1 Marker decal 50WH

– – 1 Marker decal 305VN–G

– – 1 Marker decal 306VN–G

– – 1 Marker decal 21GA–J1

– – 1 Marker decal 3WH–P1

– – 1 Marker decal 4WH–P1

– – 1 Marker decal 37WH–J1

– – 1 Marker decal 50WH–J1

– – 1 Marker decal 7WHC–J1

– – 1 Marker decal 35HL–J1

– – 1 Marker decal 36HL–J1

– – 1 Marker decal 42WW–J1

– – 1 Marker decal 91VP–P2

– – 1 Marker decal 92VP–P2

– – 1 Marker decal 205VU–J17

– – 1 Marker decal 205VU–P17

– 6127432–016 

O/T

IT18R.NN901

O/T

IT18RNN3P

13 Marker plate – at 2WHC,

3WHC, 36WH,

1HL, 2HL,

3WH–P1,

4WH–P1,

37WH–J1,

42WW–J1,

91VP–P2,

92VP–P2,

205VU–J17,

205VU–P17
Service Bulletin

11 July 2014 340–27–120

Page 40 of 76

Item Part Number Qty Nomenclature Designation Remarks

– 55T9081–16–9 1700mm Wire WHC36–1601 ( AWG16 )

– 55T8015–24–9 2000mm Wire GA3001–2401

– 55T8015–24–9 2000mm Wire GA3002–2401

– 55T8015–24–9 300mm Wire GA3003–2401

– 55T8015–24–9 300mm Wire GA3004–2401

– 55T8015–24–9 1000mm Wire WH375–2401

– 55T8015–24–9 1000mm Wire WH376–2401

– 55T8015–24–9 300mm Wire WH3000–2401

– 55T8015–24–9 1500mm Wire WH3003–2401

– 55T8015–24–9 1500mm Wire WH3004–2401

– 55T8015–24–9 1200mm Wire WH3005–2401

– 55T8015–24–9 2500mm Wire HL13–2401 Valid for A/C

004–219

– 55T8015–24–9 3000mm Wire HL25–2401 Valid for A/C

004–219

– 55T8015–24–9 2500mm Wire HL64–2401 Valid for A/C

220–459

– 55T8015–24–9 3000mm Wire HL67–2401 Valid for A/C

220–459

– 55T8015–24–9 2500mm Wire HL3000–2401

– 55T8015–24–9 3000mm Wire HL3001–2401 Valid for A/C

004–219

– 55T8015–24–9 1700mm Wire HL3002–2401

– 55T8015–24–9 2500mm Wire HL3003–2401

– 55T8015–24–9 2500mm Wire HL3004–2401 Valid for A/C

004–219

– 55T8015–24–9 1700mm Wire HL3005–2401

– 55T8015–24–9 5000mm Wire HL3006–2401 Valid for A/C

220–459, use

3000 mm for A/C

PRE

SB340–71–053

– 55T8015–24–9 5000mm Wire HL3007–2401 Valid for A/C

220–459, use

2500 mm for A/C

PRE

SB340–71–053
Service Bulletin

11 July 2014 340–27–120

Page 41 of 76

Item Part Number Qty Nomenclature Designation Remarks

– 55T8015–24–9 6000mm Wire HL3008–2401 Valid for A/C

402–439 POST

SB340–71–053

and for A/C

440–459 with

Option 243–2 installed (ACT Engine Air Intake)

– 55T8015–24–9 6000mm Wire HL3009–2401 Valid for A/C

402–439 POST

SB340–71–053

and for A/C

440–459 with

Option 243–2 installed (ACT Engine Air Intake)

– 55T8015–24–9 300mm Wire WHC1–2401

– 55T8015–24–9 500mm Wire WHC2–2401

– 55T8015–24–9 500mm Wire WHC3–2401

– 55T8015–24–9 1500mm Wire WHC4–2401

– 55T8015–24–9 1500mm Wire WHC5–2401

– 55T8015–24–9 300mm Wire WHC6–2401

– 55T8015–24–9 300mm Wire WHC7–2401

– 55T8015–24–9 300mm Wire WHC8–2401

– 55T8015–24–9 300mm Wire WHC9–2401

– 55T8015–24–9 300mm Wire WHC10–2401

– 55T8015–24–9 300mm Wire WHC11–2401

– 55T8015–24–9 300mm Wire WHC12–2401

– 55T8015–24–9 300mm Wire WHC13–2401

– 55T8015–24–9 1500mm Wire WHC14–2401

– 55T8015–24–9 5500mm Wire WHC15–2401

– 55T8015–24–9 4500mm Wire WHC16–2401 Use 3000 mm for

A/C 079–459

– 55T8015–24–9 4500mm Wire WHC17–2401 Use 3000 mm for

A/C 079–459

– 55T8015–24–9 500mm Wire WHC18–2401 Valid for A/C

004–078

– 55T8015–24–9 1500mm Wire WHC19–2401

– 55T8015–24–9 1500mm Wire WHC20–2401

– 55T8015–24–9 500mm Wire WHC21–2401
Service Bulletin

11 July 2014 340–27–120

Page 42 of 76

Item Part Number Qty Nomenclature Designation Remarks

– 55T8015–24–9 500mm Wire WHC22–2401

– 55T8015–24–9 1700mm Wire WHC23–2401

– 55T8015–24–9 2200mm Wire WHC24–2401

– 55T8015–24–9 300mm Wire WHC25–2401

– 55T8015–24–9 1700mm Wire WHC26–2401

– 55T8015–24–9 300mm Wire WHC27–2401

– 55T8015–24–9 300mm Wire WHC28–2401

– 55T8015–24–9 1700mm Wire WHC29–2401

– 55T8015–24–9 2200mm Wire WHC30–2401

– 55T8015–24–9 5500mm Wire WHC31–2401

– 55T8015–24–9 3500mm Wire WHC32–2401

– 55T8015–24–9 4500mm Wire WHC33–2401

– 55T8015–24–9 4500mm Wire WHC34–2401

– 55T8015–24–9 1200mm Wire WHC35–2401

– 55T8015–24–9 1200mm Wire WHC37–2401

– 55T8015–24–9 6000mm Wire WHC38–2401 Use 4500 mm for

A/C 079–459

– 55T8015–24–9 300mm Wire WHC39–2401 Valid for A/C

004–078

– 55T8015–24–9 1500mm Wire WHC40–2401

– 55T8015–24–9 1000mm Wire WHC41–2401 Valid for A/C

079–459

– 55T8015–24–9 1500mm Wire WHC44–2401 Valid for A/C

079–459

– 55T8015–24–9 2200mm Wire WHC45–2401 Valid for A/C

079–459

– 55T8015–24–9 1300mm Wire WHC46–2401 Valid for A/C

079–459

– 55T8015–24–9 2000mm Wire WHC47–2401 Valid for A/C

079–459

– 55T8015–24–9 300mm Wire WHC48–2401
Service Bulletin

11 July 2014 340–27–120

Page 43 of 76

FOR A/C 079–459 PRE SB340–34–139

B. Modification Kit No SAAB 340–27–120–02 contains: (Part A)

Item Part Number Qty Nomenclature Designation Remarks

232 MTC100–JH–2–R22 1 Receptacle 205VU–J17

233 MTCP–122–20P1 1 Insert pin A1B1

(Wafer)

– 205VU–J17

234 CHA–0124 4 Dummy Wafer – 205VU–J17/P17

235 MTC100–JH–2–P22 1 Plug Housing 205VU–P17

236 MTCP–122–20S1 1 Insert socket A1B1

(Wafer)

– 205VU–P17

 237 NAS1101–06–36 2 Screw – for 205VU–J17

– – 1 Marker decal 205VU–J17

– – 1 Marker decal 205VU–P17

FOR A/C ALL

C. Local supply (Part A)

Item Part Number Qty Nomenclature Designation Remarks

– NITTO 665 AR Silicone tape –

– – AR Lacing cord –

– – AR Cable–tie –

– – AR Alodine 1500 – MIL–C–5541

Class 3

– PR 1422 B–1/2 A/R Sealant – MIL–S–8802

Type II, Class

B–1/2

– Methyl–Ethyl–Ketone (MEK)A/R Cleaning agent – TT–M–261

NOTE: Equivalent materials can be used for listed items, Ref. SRM 51–33–00.

D. Removal (Part A)

FOR A/C 200–459

Item Part Number Qty Nomenclature Designation Remarks

112 YHLZ1–C–7 1 Dummy block 3VT

FOR A/C 079–459 PRE SB340–34–139

 – NAS1101–06–30 2 Screw – at 205VU
Service Bulletin

11 July 2014 340–27–120

Page 44 of 76

5. MATERIAL INFORMATION PART B

A. Modification Kit No SAAB 340–27–120–03 contains: (Part B)

Item Part Number Qty Nomenclature Designation Remarks

25 M39029/101–553 2 Contact 35HL–J1, 

36HL–J1,

28 D–436–36 6 Butt splice 2292VS–B, 

293VS–B, 

292VS–C, 

293VS–C,

Unmarked

splices qty. 2

– RNF–100 3/16 1 Marker sleeve 292VS–B

– RNF–100 3/16 1 Marker sleeve 293VS–B

– RNF–100 3/16 1 Marker sleeve 292VS–C

– RNF–100 3/16 1 Marker sleeve 293VS–C

– RNF–100 3/16 100mm Shrinkable tubing – For the unmarked splices.

– 55T8015–24–9 5000mm Wire HL3006–2401

– 55T8015–24–9 5000mm Wire HL3007–2401

– 55T8015–24–9 6000mm Wire HL3008–2401

– 55T8015–24–9 6000mm Wire HL3009–2401

B. Local supply (Part B)

Item Part Number Qty Nomenclature Designation Remarks

– NITTO 665 AR Silicone tape –

– – AR Lacing cord –

– – AR Cable–tie –

NOTE: Equivalent materials can be used for listed items.

FOR A/C ALL
Service Bulletin

11 July 2014 340–27–120

Page 45 of 76

A31622

215BZ 216BZ

215CZ 216CZ

215FZ 216FZ

215DZ 216DZ

10 VU

215GZ

11VU

215EZ 216EZ

12VU

216GZ

210BZ

210CZ

210EZ

210GZ

117AL

210AL

118AR

210AR

117BZ

STA

186.0

STA

215.0

A

210AZ

AVIONIC

RACK

220AZ

VIEW A

Access Panels – Location

FIG. 1
Service Bulletin

11 July 2014 340–27–120

Page 46 of 76

A31623

6.12 0.04 in

(155.5 1 mm)

3.96 0.04 in

(100.5 1 mm)

0.689 0.01 in

(17.5 0.25 mm)

(0.8 mm)

R 0.0315 in

(TYP 4 PLCS)

SQUARE

Center Instrument Panel 1VU – Modification of Panel 1VU for Installation of Pusch Button Switch 3WHC

FIG. 2
Service Bulletin

11 July 2014 340–27–120

Page 47 of 76

A31633



















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Wiring Diagram System HL – PRE MOD for 004–219

FIG. 3
Service Bulletin

11 July 2014 340–27–120

Page 48 of 76

A31634



















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Wiring Diagram System HL – POST MOD for A/C 004–219

FIG. 4
Service Bulletin

11 July 2014 340–27–120

Page 49 of 76

A31635


















	

	

		

		



 



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Wiring Diagram System HL – PRE MOD: for A/C 220–401, and for A/C 402–439 Pre SB340–71–053, and for

A/C 440–459 without Option 243–2. (A/C with COX Engine Air Intake)

FIG. 5
Service Bulletin

11 July 2014 340–27–120

Page 50 of 76

A31636



















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Wiring Diagram System HL – POST MOD: for A/C 220–401, and for A/C 402–439 Pre SB340–71–053, and for

A/C 440–459 without Option 243–2. (A/C with COX Engine Air Intake)

FIG. 6
Service Bulletin

11 July 2014 340–27–120

Page 51 of 76

A31637












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Wiring Diagram System HL – PRE MOD: for A/C 402–439 Post SB340–71–053, and for A/C 440–459 with

Option 243–2 Installed. (A/C with ACT Engine Air Intake)

FIG. 7
Service Bulletin

11 July 2014 340–27–120

Page 52 of 76

A31638















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Wiring Diagram System HL – POST MOD: for A/C 402–439 Post SB340–71–053, and for A/C 440–459 with

Option 243–2 installed. (A/C with ACT Engine AIr Intake)

FIG. 8
Service Bulletin

11 July 2014 340–27–120

Page 53 of 76

A31639

 

      

 

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Wiring Diagram System WH – PRE MOD for A/C 004–459

FIG. 9
Service Bulletin

11 July 2014 340–27–120

Page 54 of 76

A31640

      

 

	

 

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Wiring Diagram System WH – POST MOD for A/C 004–459

FIG. 10
Service Bulletin

11 July 2014 340–27–120

Page 55 of 76

A31641

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Wiring Diagram System GA – PRE MOD for A/C 004–459

FIG. 11
Service Bulletin

11 July 2014 340–27–120

Page 56 of 76

A31642

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POST MOD

Wiring Diagram System GA – POST MOD for A/C 004–459

FIG. 12
Service Bulletin

11 July 2014 340–27–120

Page 57/58 of 76

A31631







 

 

  







 



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New System WHC – Wiring Diagram for A/C 004–078

FIG. 13
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 58
Service Bulletin

11 July 2014 340–27–120

Page 59/60 of 76

A31632

	

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New System WHC – Wiring Diagram for A/C 079–459

FIG. 14
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 60
Service Bulletin

11 July 2014 340–27–120

Page 61/62 of 76

A31624

AIR DIST. REF

8.47 in (215.1 mm)

Electrical Center 305VU – Installation of Relay Console

FIG. 15
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 62
Service Bulletin

11 July 2014 340–27–120

Page 63/64 of 76

A31625

8.47 in (215.1 mm)

1.97 in

(50.0 mm)

4.18 in

(106.2 mm)

06

COMP. PRESS. REFAIR DIST. REF

Electrical Center 306VU – Installation of Relay Console

FIG. 16
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 64
Service Bulletin

11 July 2014 340–27–120

Page 65/66 of 76

A31626

TO OVHD

Flight Compartment – Component Location and Wire Routing

FIG. 17 (Sheet 1 of 5)
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 66
Service Bulletin

11 July 2014 340–27–120

Page 67/68 of 76

A31627

1

1 INSTALL BLANK LABEL ITEM 13 ON TOP OF THE PUSH BUTTON SWITCH 3WHC

Flight Compartment – Component Location and Wire Routing

FIG. 17 (Sheet 2 of 5)
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 68
Service Bulletin

11 July 2014 340–27–120

Page 69/70 of 76

A31628

TO VIEW AE TO 

7

INSTALL CONVOLUTEDTUBE ON HARNESS TOEXISTING RELAY CONSO

LOCATION:

S28

1

1

2

2

SECURE C/B 2WHC IN OPEN POSITION. INSULATE WITH SHRINK SLEEVE AND STOW BEHIND C/B PANEL 12VU

PARK AND STOW WIRE WHC36–1601 BEHINDC/B PANEL 10VU ADJACENT TO C/B 36WH

Flight Compartment and Electrical Center – Component Location and Wire Routing

FIG. 17 (Sheet 3 of 5)
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 70
Service Bulletin

11 July 2014 340–27–120

Page 71/72 of 76

A31629

TO VIEW

H–H

TO VIEW

H–H

21GA

21GA–J1

TO VIEW

H – H

Electrical Center – Component Location and Wire Routing

FIG. 17 (Sheet 4 of 5)
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 72
Service Bulletin

11 July 2014 340–27–120

Page 73/74 of 76

A31630

Electrical Center and Avionics Rack – Component Location and Wire Routing

FIG. 17 (Sheet 5 of 5)
Service Bulletin

Date Month Year

Revison X, Date Month Year

340–XX–XXX

Page 74
Service Bulletin

11 July 2014 340–27–120

Page 75 of 76



















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A31667

PART B PRE MOD

PART B. Wiring Diagram System HL – PRE MOD: for A/C Post SB340–27–097 and equipped with ACT Engine

Air Intake (installed by SB340–71–053 or by Option 243–2)

FIG. 18
Service Bulletin

11 July 2014 340–27–120

Page 76 of 76















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PART B POST MOD

A31668

PART B. Wiring Diagram System HL – POST MOD: for A/C Post SB340–27–097 and equipped with ACT

Engine Air Intake (installed by SB340–71–053 or by Option 243–2)

FIG. 19