ADVANCED AIRCRA FT 

EXTINGUISHERS 

105.2 S\V Luttrell 

Blue Spring~. I\10 64015 

USA 

Telephone: (81 6) 228-3322 

em a i 1: =-c"'"··""""·'·'"---·'-'-"''--~-'--'-'-'--' www.aae-hd.com 

SERVICE BULLETIN- TFAl0-26-0020 

Installation of AAE Cargo Fire Protection System (FPS} 

Placards and Suppression Harnesses on the 8737-400 series 

aircraft equipped with the AAE FPS Kit Configuration 

8737-400{-1400} 

Revision · Issue Date Approved By 1 

R ________________ +i_Ja nu_a_ry~1_2~,2_0_1_5 __________ ~~~~=------~ 

--- ----'---- ____ .J........... ________ _] 

• Changes to this Service Bulletin are indicated by a bar in the left hand margin. 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 1 of 17 
SAFETY INTENT 

This Service Bulletin identifies a possible "unsafe" condition when the AAE Cargo Fire Protection 

System Placards identifying Extinguisher Bottle 1 and Bottle 2, and their respective electrical Pressure 

Switch and Squib Harnesses at the Suppression Rack, were installed on the 8737-400 series aircraft. 

Upon review of AAE Installation Drawings TFC07-0062Q, "Class C Cargo Comp. FPS Placard Location 

Instructions", Sheets 5, 6, and 7, it was found that, the callouts for the following placards are shown in 

the wrong locations. 

- BOM Item No. -220 "BTL 1 Cargo Suppression", P/N TFC05-0044-36 is shown to be installed on BTL 2 

- BOM Item No. -223 "BTL 1 Pressure Switch", P/N TFC05-0044-39 is shown to be installed on BTL 2 

- BOM Item No. -225 "BTL 1 Squib", P/N TFCOS-0044-41 is shown to be installed on BTL 2 

And 

- BOM Item No. -221 "BTL2 Cargo Suppression ", P/N TFCOS-0044-37 is shown to be installed on BTL 1 

- BOM Item No. -224 "BTL 2 Pressure Switch ", P/N TFCOS-0044-40 is shown to be installed on BTL 1 

- BOM Item No. -226 "BTL 2 Squib", P/N TFCOS-0044-42 is shown to be installed on BTL 1 

Further, if it is verified that the placards were installed incorrectly, this may have resulted in the BTL 1 

and BTL 2 Suppression Harnesses being mated to the Pressure Switch and Squib on the wrong 

extinguisher bottle, decreasing the ability of the AAE FPS Suppression System to provide enough 

extinguishing agent to put out a fire and keep it suppressed for the required duration of protection. 

This Service Bulletin is intended to resolve the unsafe condition by providing the 

operator/maintenance personnel with step-by-step instructions on how to (1) inspect the AAE Cargo 

FPS Placards and Suppression Harnesses at the Suppression Rack Assembly to determine if they are 

installed correctly; and if they are not, (2) re-install new placards and suppression harnesses in a 

manner that will eliminate the current unsafe condition and remove the possibil ity of it reoccurring 

during future scheduled maintenance. 

To accomplish this, it's important to understand that the 151 Extinguisher Bottle (BTL 1) of the AAE 

Ca rgo FPS always provides a "High-Rate Knockdown" agent discharge. And the 2 nd Extinguisher Bottle 

(BTL 2) of the AAE Cargo FPS always provides a "Metered" discharge of agent to sustain the 

concentration of agent in the compartment for the required duration of protection. To help the 

installer/maintenance personnel understand, below is a photo ofthe "Auto-Fire" Cargo FPS Control 

Panel, P/N TFC12-0077-1, along with a diagram of the suppression rack installation for the 8737-400 

equipped with AAE A/C Configuration (-1400). 

Note BTL 2, regardless of its location, is always the container that is connected to the metering 

device. 

Service Bulletin TFAl0-26-00ZO 

Revision IR 

Page Z of 17 
LOOP DET. & FAIL LED's ( AM BER) 

AAE "Auto-Fire" Control Panel, 

P/N TFC12-0077-1 For B737-400 

aircraft that are equipped with 

AAE A/C Configuration (-1400) 

8 

CARGSUO PPRESS DE T......_EC.:- ION ---.. t-.! ~ ~@).. · I. AUTO/M AN 

II 

FIR£ WARNING LED (RED) 

0 

Pushing this "DSCH" 

switch (left side) fires 

the "Knock-down" 

discharge from BTL 1 

0 0 

---· 

This "AUTO/MAN DSCH" switch 

(right side) automatically fires 

the "Metered" discharge from 

BTL 2 after 5 minutes 

\ F-'L-"·: ,:.pn LOC;Th) l l':. - •;I IPPF·E•:;-:;h:•ll ·~ ST I. I i I ; 

., 

J==:=:3' rrl, 

\ 

~ 

SQUIB LED's (GREEN) 

(TYP. 4 PLCS.) 

I 

I 

D 0 

AAE Cargo FPS Suppression Rack Installation (View looking AFT) 

For B737-400 aircraft that are equipped with AAE A/C Configuration (-1400) 

(Section shown above is from AAE Installation drawing TFC07-0062Q, Sheet 7, Rev. A dated 12/05/14) 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 3 of 17 
ACRONYMS 

AD- Airworthiness Directive 

CT- Critical Task(s) 

DAH- Design Approval Holder 

FAA- Federal Aviation Administration 

FPS- Cargo Fire Protection System 

RC- Required for Compl iance 

SB· Service Bulletin 

STC - Supplemental Type Certificate 

TC- Type Certificate 

DEFINITIONS 

Required for Compliance (RC)- Notates which steps in this SB must be done for compliance with an 

AD. Steps with the "RC" notation have a direct effect on detecting, preventing, resolving, or 

eliminating the unsafe condition identified above. 

NOTES 

1. Some steps in the "SERVICE BULLETIN INSTRUCTIONS" section ofthis SB are identified as Required 

for Compliance (RC). Such steps are preceded with a notation "RC" and are determined to be critical 

tasks that have a direct effect on detecting, preventing, resolving, or eliminating the unsafe condition 

identified by this SB. lfthis SB is mandated by an airworthiness directive (AD), the steps identified as 

RC must be done to comply with the AD. 

Steps not identified with RC are recommended and may be deviated from; done as a part of other 

actions; or done with accepted methods different from those given in this SB, if the RC steps can be 

done, and the airplane returned to a serviceable condition. 

2. This SB includes instructions that refer to steps, methods, techniques, and practices described in 

other AAE, LTD documents. When the words "refer to" are used and there are other acceptable 

methods, techniques, and practices (including tools, equipment, and test equipment) those 

acceptable methods, techniques, practices (including tools, equipment, and test equipment) may be 

used to complete the work. When the words "in accordance with" are used, the steps, methods, 

techniques, and practices (including tools, equipment, and test equipment) in the AAE, Ltd document 

must be used." 

3. The AAE Kit Part Numbers/serial numbers identified in the "EFFECTIVITY" section of this SB were 

purchased and intended for installation on the specific 8737-400 aircraft serial numbers shown. 

However, it's possible that the AAE Kit was actually installed on another 8737-400 aircraft that has a 

different aircraft serial number that is not shown. This Service Bulletin is effective, and compliance is 

required, for all 8737-400 aircraft that are equipped with the AAE Kit Serial Numbers shown in the 

"EFFECTIVITY" section of this 58 regardless of what aircraft serial number they were actually installed 

on, except for those aircraft that have been scrapped. 

Service Bulletin TFA10·26-0020 

Revision IR 

Page 4 of 17 
! 

; 

i 

' 

I 

COMPliANCE 

For "active" aircraft, this (SB) shall be performed as soon as possible during the next scheduled 

maintenance stop but no later than 30 days. 

For "Inactive" aircraft, this (SB) shall be performed before the aircraft is returned to service. 

For aircraft that have been scrapped, only Section F of this SB is app licable. 

APPROVAL 

The technical content of this Service Bulletin that affects the AAE Cargo FPS type design is FAA approved. 

EFFECTIVITY 

The following AAE Cargo FPS Kits may be affected ---·-········---~ 

--

I '""hmd B>l 

I Purchased for 

AAE,LTD AAE ALC AAE Kit Part Number L Kit I Installation on Status 12[12[14 Qer 

FAA Configuration Serial Number[Work Date[Purchase Order Aircraft Serial " www.Airfleets.net" 

STC Number Order No. Number ffi!mber .......... _. __ ST01114WI -1400 TFK B737 ·400-1400 AEFGH Aersale, Inc. I March 2011 25417 I Inactive -Stored 

' I 352 I 030111-P2 I P.O. 10005335 i 

- ST01114WI i -1400 TFK 8737-400-1400 AEFGH Aersale, Inc. I March 2011 j 27149 Active. Operated by 

ST01114WI--1 -1400 ---

I 298 I 030111-Pl I P.O. 10005335 I Xtra Airways ! 

i 

···-····-····-·~.....,.·-· I 

TFK 8737-400-1400 AEFGH AirCastle Advisor LLC I i 27003 ! Inactive- Stored 

I I 355 I 060811-Pl June 20111 P.O. 1148-0- I October 2014 

TECHI2011 ' i 

ST01114WI -1400 TFK 8737-400-1400 AE FGH Aviation Capital Group I l 28661 I Active. Operated by 

I 254 I 020707-Pl February 2007 I P.O. i Gading Sari Aviation 

28661RyanCSFD-1 ! Services ·-·~·- ST01114wl l -1400---· TFK 8737-400-1400 AEFGH I Boeing Capital c~~p~~ation 24132 I Active. Operated by 

I I 215 I 110405-P1 

1 

I November 2005 I P.O. , I Peruvian Airlines. 

i 24132-DEL-003 J I 

ST01114Wl ,-1400 TFK 8737-400-1400 AEFGH Castle 2003 lA LLC I August 1 25375 i Active. Operated by 

I 318 I 080609-Pl 2009 I P.O. 2801 l I Rio Linhas Aereas 

I .. _..! __ ,...,, 

ST01114WI ! -1400 i TFK 8737-400-1400 AEFGH ! Castle 2003 lA LLC I May 26281 I Active. Operated by 

I ST01114WI 

i i I 356 I 050911-P2 I 2011 I P.O. 4392 ~ Sriwijaya Air 

I I 

1·1400 1 TFK B737-4oo-14cicl"AEFGH -- GECAS- US, ACS of Spain I 1 23865 ' Active- Freighter 

1 I 291 I 100807-P1 October 2007 I P.O. ! ; 

I ST01114WI 

I 

i 

-1400 I TFK 8737-400-1400 AEFGH 

t I 333 I 061510-Pl 

! ST01114WI i -1400 I TFK 8737-400-1400 AEFGH 

I I I 313 I 050209·P1 i 

I ·- '"'"~"'''-n·m.,..,.,_,,;,...."w' < 

l ST01114WI -1400 I TFK 8737-400-1400 AEFGH 

I I 317 I 071609-Pl 

! l848097 i 

GECAS- US, ACS of Spain I 28881 I Active - Freighter 

1 June 2010 I P.O. L866410 I 

MacQuarie AirFinance I I 24474 I Active. Operated by I 

June 2009 I P.O. 3055-0- ! Cargo Air 

1950 i •••••••••--····~··-•••<•-oNOo-••-•·-··-·--~· •.... ,.,.~ .... 

Sky King Inc. I July 2009 I 

P.O. 15290 I 

I 

24706 , Inactive- Stored. Sky 

J King. Leased from I 1 ILFC 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 5 of 17 
INSTALLATION DRAWINGS AND DOCUMENTS 

This Service Bulletin includes the follow ing AAE installation drawings and data. 

Supplement Type Certificate STC No. ST01114WI 

AAE Drawing TFA10-0061, Mast er Drawing List, Revision U*, dated 12/05/14 for STC No. 

ST01114WI 

AAE Drawing TFC07-0073, Bill of Materials, Revision D*, dated 07/27/11 for STC No. ST01114WI 

AAE Installation Drawing TFC07-0062Q, Class C Cargo Comp. FPS Placard Location Instructions, 

Sheet 7, Revision A dated 12/05/14 * 

AAE Installation Drawing TFC07-0062N, Class C Cargo Camp. FPS Tubing/Wiring Suppression Rack 

Install. Instructions, Sheet 9, Revision IR dated 07/05/05 * 

AAE Installation Drawing TFC03-0252, System Diagram Fire Suppression 8737, Sheet 1, Revision IR 

dated 04/01/03 * 

AAE System Maintenance Manual TFC18-0207, Rev. IR, dated 11/25/09 Chapter 26-23-00 * 

(" Or Later FAA approved revision) 

Please contact AAE to obtain copies of the above data if needed. 

AAE PARTS, MATERIALS, AND TEST EQUIPMENT 

This Service Bulletin includes the following AAE parts, materials, and test equipment. 

Qty 1 of BOM Item No. -220 Placard, "BTL 1 Cargo Suppression", P/N TFC05-0044-36 

Qty 1 of BOM Item No. -223 Placard, "BTL 1 Pressure Switch", P/N TFCOS-0044-39 

Qty 1 of BOM Item No. -225 Placard, "BTL 1 Squib", P/N TFCOS-0044-41 

Qty 1 of BOM Item No. -221 Placard, "BTL 2 Cargo Suppression", P/N TFC05-0044-37 

Qty 1 of BOM Item No. -224 Placard, "BTL 2 Pressure Switch", P/N TFCOS-0044-40 

Qty 1 of BOM Item No. -226 Placard, "BTL 2 Squib", P/N TFCOS-0044-42 

Qty 1 of BTL 2 Extension Harness Assembly 

Qty 2 of Heat Shrink P/N FIT221-1-1/2(CLR) 

Qty 4 of Terminal, Ring #10 P/N 36154 

Qty 4 of End Caps, P/N MS25274-2 

Please contact AAE to obtain the above parts if they are missing. 

If not already in your inventory, contact AAE, Ltd to obtain Squib Tester, P/N TFC20-0003-2. Availability is 

3-5 days ARO. Your order shou ld be submitted by ema il to sales@aae-ltd.com or 

aaeltd@compuserve.com; or by fax at 816-228-4191. 

The BTL 2 Extension Harness Assembly included wit h the SB was built by AAE using the materials, notes, 

and specifications shown in Appendix 1. 

Service Bulletin TFAl0-26·0020 

Revision IR 

Page 6 of 17 
SERVICE BULlETIN INSTRUCTIONS 

A. Gain access to the aircraft and the AAE Cargo FPS Suppression Rack Assembly located at F.S.540 

between LBL 32.47 and RBL 27.55. 

(1) Location Zones 

Flight Compartment- Left 

Flight Compartment- Right 

Forward Cargo Compartment 

(2) Access Panels 

4404R, Forward Cargo Compartment 

(3) Open the forward cargo door, 4404R. 

{4) Remove the bulkhead at the aft end of the forward cargo compartment to gain access to 

the 

fire suppression bottles. 

B. RC- Perform a detailed visual inspection of the AAE Cargo FPS Placards to verify they are the correct 

placards and that they are installed in the proper locations as follows: 

(1) At the AAE Cargo FPS Extinguisher Bottle, BTL 1, P/N TFC14-0039-1, located at F.S. 540 

between LBL 24.97-LBL 6.25- Using AAE Drawing, Placard Location Instructions, TFC07-

0062Q, Sheet 7, Revision A dated 12/05/14, or later FAA approved revision 

1. Visually inspect the placards installed on the AAE BTL 1 Suppression Mounting Plate 

P/N TFC06-0127-101 (BOM Item 692). Verify they are the following placards and 

that they are installed in the locations on the mounting plate in accordance with 

this AAE Drawing. 

I. BOM Item No. -220 Placard, "BTL 1 Cargo Suppression", P/N TFC05-0044-36 

2. BOM Item No. -223 Placard, "M9404 BTL 1 Pressure Switch", P/N TFCOS0044-39 

3. BOM Item No. -225 Placard, "M9404 BTL 1 Squib", P/N TFC05-0044-41 

if they ARE the correct placards and they are installed in accordance with the AAE 

Drawing, proceed to Step B (2) of this 58. 

If they ARE NOT the correct placards or they ARE NOT installed in accordance with 

the AAE Drawing, accomplish Steps B (1ii) and 8 (1iii} below. 

11. Remove the existing AAE Cargo FPS Placards (i.e. BOM Item No. -221, -224, and226) from the mounting plate P/N TFC06-0127-101 (BOM Item 692) and 

destroy/discard them. 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 7 of 17 
SERVICE BULLETIN INSTRUCTIONS (Cont.) 

111. Install the following AAE provided Cargo FPS Placards on the Mounting Plate, P/N 

TFC06-0127-101 in accordance with the AAE Drawing, Placard Location Instructions, 

TFC07-0062Q Sheet 7, Revision A dated 12/05/14 or later FAA approved revision . 

l. BOM Item No. -220 Placard, "BTL 1 Cargo Suppression", P/N TFCOS-0044-36 

2. BOM Item No. -223 Placard, "M9404 BTL 1 Pressure Switch", P/N TFCOS0044-39 

3. BOM Item No. -225 Placard, "M9404 BTL 1 Squib", P/N TFCOS-0044-41 

n ·. Proceed to Step B (2) 

(2) At the AAE Cargo FPS Extinguisher Bottle, BTL 2, P/N TFC14-0051-1, located at F.S. 540 

between RBL 12.8-RBL 27.55- Using AAE Drawing, Placard Location Instructions, TFC07-

0062Q Sheet 7, Revision A dated 12/05/14, or later FAA approved revision 

1. Visually inspect the placards installed on the AAE BTL 2 Suppression Mounting Plate 

P/N TFC06-0152-101 {BOM Item 290). Verify they are the following placards and 

that they are installed in the locations on the mounting plate in accordance with 

this AAE Drawing. 

1. BOM Item No. -221 Placard, "BTL2 Cargo Suppression", P/N TFCOS-0044-37 

2. BOM Item No. -224 Placard, "M9405 BTL 2 Pressure Switch", P/N TFC05-

0044-40 

3. BOM Item No. -226 Placard, "M9405 BTL 2 Squib", P/N TFCOS-0044-42 

If they ARE the correct placards and they are installed in accordance with the AAE 

Drawing, proceed to Step C of this 58. 

If they ARE NOT the correct placards or they ARE NOT instalfed in accordance with 

the AAE Drawing, accomplish Steps B (2U} and 8 (2iii) below. 

11. Remove the existing AAE Cargo FPS Placards (i.e. BOM Item No. -220, -223, and -

225) from the mounting plate P/N TFCOG-0152-101 {BOM Item 290) and 

destroy/discard them. 

111. Install the following AAE provided Cargo FPS Placards on the Mounting Plate, P/N 

TFCOG-0152-101 in accordance with the AAE Drawing, Placard location Instructions, 

TFC07-0062Q Sheet 7, Revision A dated 12/05/14 or later FAA approved revision. 

1. BOM Item No. -221 Placard, "BTL 2 Cargo Suppression", P/N TFC05-0044-37 

2. BOM Item No. -224 Placard, "M9405 BTL 2 Pressure Switch", P/N TFC05-

0044-40 

3. BOM Item No. -226 Placard, "M9405 BTL 2 Squib ", P/N TFC05-0044-42 

n ·. Proceed to Step C of this 58 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 8 of 17 
SERVICE BULLETIN INSTRUCTIONS (Cont.) 

C. RC- Perform a detailed visual inspection of the AAE Cargo FPS Suppression Harnesses to verify proper 

Harness Installation of Extinguisher Bottle's Pressure Switch Harnesses and Squib Harnesses using AAE 

System Diagram, TFC03-0252, Sheet 1 at Revision IR dated 04/01/03, or later FAA approved revision 

and AAE Installation Drawing TFC07-0062N, Class C Cargo Comp. FPS Tubing/Wiring Suppression Rack 

Install. Instructions, Sheet 9 Revision IR dated 07/05/05 or later FAA approved revisions as follows: 

(3) At the AAE Cargo FPS Extinguisher Bottle, BTL 1, P/N TFC14-0039-1. installed on 

Suppression Mounting Plate P/N TFC06-0127-101, between LBL 24.97-LBL 6.25-

1. Inspect the electrical harness connected to the bottles pressure switch and 

I. Verify it is marked (D9495) ''BTL 1 Pressure Switch Harness P/N TFC03-0255-

103" and, 

2. Verify it is mated to BTL 1's pressure switch connector. 

u. Inspect the electrical harness connected to the bottles squib and 

l. Verify it is marked (D9494) "BTL 1 Squib Harness P/N TFC03-0255-102" and, 

2. Verify it is mated to BTL 1's squib connector. 

If they ARE the correct harnesses and they are installed in accordance with the 

AAE Drawing, proceed to Step 4 of this SB as applicable to the AAE A/C 

Configuration installed on your aircraft. 

If they ARE NOT the correct harnesses or they ARE NOT installed in accordance 

with the AAE Drawing, proceed to Step 4 of this 58 as applicable to the AAE A/C 

Configuration installed on your aircraft. 

(4) At the AAE Cargo FPS Extinguisher Bottle, BTL 2, P/N TFC14-0051-l, installed on 

Suppression Mounting Plate P/N TFC06-0152-101, between RBL 12.8-RBL 27.55-

1. Inspect the electrical harness connected to the bottles pressure switch and 

I. Verify it is marked (09496) "BTL 2 Pressure Switch Harness P/N TFC03-0255-

105" and, 

? Verify it is mated to BTL 2's pressure switch connector. 

n. Inspect the electrical harness mated to the bottles squib and 

I . Verify it is marked (09497) ''BTL 2 Squib Harness P/N TFC03-0255-104" and, 

2. Verify it is mated to BTL 2's squib connector. 

If they ARE the correct harnesses and they are installed in accordance with the 

AAE Drawing, proceed to Step E of this SB as applicable to the AAE A/C 

Configuration installed on your aircraft. . 

If they ARE NOT the correct harnesses or they ARE NOT installed in accordance 

with the AAE Drawing, accomplish Steps C (5) thru (11) of this SB. 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 9 of 17 
SERVICE BULLETIN INSTRUCTIONS (Cont.) 

(5) At the P6-2 Panel located behind the Flight Officer's chair, locate the Cargo FPS circuit 

breakers "CARGO SMOKE DETECTORS- A LOOP", "CARGO SMOKE DETECTORS- B 

LOOP", AND "CARGO SMOKE CONTROL/FAULT PNLS", "OPEN" them, and install a "DO 

NOT CLOSE" tag to prevent accidental discharge of the bottles and diverter valve. 

(6) Disconnect (D9496) "BTL 2 Pressure Switch Harness, P/N TFC03-0255-105" from BTL l's 

Pressure Switch and remove D9496 ground wires (W9448-001-20 and W9448-002-20) 

from ground studs (GD9184-DC and GD9185-S) 

(7) Disconnect (D9497) "BTL 2 Squib Harness, P/N TFC03-0255-104" from BTL l's Squib and 

remove D9497 ground wires (W9449-001-20 and W9449-002-20) from ground studs 

(GD9182-DC and GD9183-S). 

(8) Remove the ring terminals from the BTL 2 Harness ground wires P/N W9448-001-20, 

W9448-002-20, W9449-001-20, and W9449-002-20; and install End Caps, P/N 

MS25274-2. 

(9) Disconnect (D9495) "BTL 1 Pressure Switch Harness, P/N TFC03-0255-103" from BTL 2's 

Pressure Switch and remove D9495 ground wires (W9447-001-20 and W9447-002-20) 

from ground studs (GD9184-DC and GD9185-S). 

(10) Disconnect (09494) "BTL 1 Squib Harness, P/N TFC03-0255-102" from BTL 2's Squib and 

remove 09494 ground wires (W9446-001-20 and W9446-002-20) from ground studs 

(GD9181-DC and GD9183-S). 

(11) Using AAE Installation Drawing, TFC07-0062N, Class C Cargo Camp. FPS Tubing/Wiring 

Suppression Rack Install. Instructions, Sheet 9, Revision IR dated 07/05/05 or later 

approved revisions, 

1. Re-route the BTL 2's Harnesses, (09496) "BTL 2 Pressure Switch, P/N TFC03-0255-

105" and (D9497) "BTL 2 Squib, P/N TFC03-0255-104" to the BTL 2 Extinguisher 

Container. **DO NOT MAKE CONNECTIONS YET**. 

l. If the existing harness is now too short to reach the BTL 2's connectors, then 

AAE has included a "BTL 2 Extension Harness" with this SB that can be 

connected to the existing BTL 2 Pressu re Switch and Squib Harnesses as 

follows: 

a. The end of the extension harness, without the ground wires, is the 

end that will mate to the existing BTL 2 Pressure Switch and Squib 

Harnesses. The other end of the extension harness, with the ground 

wires, is the end that will mate to BTL 2's Extinguisher Container. 

See Appendix l's Figure 1 for more details. 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 10 of 17 
SERVICE BUllETIN INSTRUCTIONS {Cont.} 

b. Slide Qty (1) 4" piece ofthe included heat shrink FIT221-1-1/2(CLR) 

over each connector at the end of the harness that will be mated to 

the existing harness (end without the ground wires). 

c. Mate the existing harnesses con nector (D9496) "BTL2 Pressure 

Switch, TFC03-0255-105" to the same connector on the BTL2 

Extension Harness (D9496) "BTL 2 Pressure Switch, TFC03-0255-

105''. Position the heat shrink over the new connection and apply 

heat until the material firmly seals the new connection. 

d. Mate the existing harnesses connector (D9497) 11BTL2 Squib, TFC03-

0255-104" to the same connector on the BTL 2 Extension Harness 

(D9497) "BTL2 Squib, TFC03-0255-104". Position the heat shrink 

over the new connection and apply heat until the material firmly 

seals the new connection. 

11. At the end of the BTL 2 Extension Harness are two sets of ground wires {W9448-

001-20/ W9448-002-20 and W9449-001-20/W9449-002-20). See Appendix 1's 

Figure 1 for more details. Connect ring terminals, P/N 36154 to the ends of these 

ground wires. Route these ground wires to the existing ground studs and connect 

them as follows: 

a. D9496 ground wire (W9448-001-20) to ground stud G09184-0C 

b. 09496 ground wire (W9448-002-20) to ground stud G09185-S 

c. 09497 ground wire (W9449-001-20) to ground stud G09182-0C 

d. 09497 ground wire (W9449-002-20) to ground stud G09183-S 

111. Re-route BTLl's Harnesses (D9495) "BTL 1 Pressure Switch, P/N TFC03-0255-103" 

and (09494) "BTL1 Squib, P/N TFC03-0255-102" to the BTLl Extinguisher 

Container. **DO NOT MAKE CONNECTIONS YET**. 

tv. Route BTL 1's Harnesses ground wires to the existing ground studs and connect 

them as follows: 

a. 09495 ground wire (W9447-001-20) to ground stud G09184-0C 

b. 09495 ground wire (W9447-002-20) to ground stud G09185-S 

c. 09494 ground wire (W9446-001-20) to ground stud G09181-DC 

d. 09494 ground wire (W9446-002-20) to ground stud G09183-S 

v Mate BTll's Harness (09495) "BTL 1 Pressure Switch, P/N TFC03-0255-103" to BTL 

l's pressure switch connector. ** DO NOT CONNECT BTL 1's Squib Harness at this 

time. 

\ '1. Mate BTL 2's Harness (09496) "BTL 2 Pressure Switch, P/N TFC03-0255-105" to BTL 

2's pressure switch connector. **DO NOT CONNECT BTL 2's Squib Harness at this 

time. 

Service Bulletin TFA10-26-0020 

Revision IR 

Page 11 of 17 
SERVICE BULLETIN INSTRUCTIONS (Cont.} 

\·ii. Secure all wire harnesses and ground wires. IMPORTANT- harnesses should be 

secured in a manner that prevents them from accidentally being connected to the 

incorrect bottle during future maintenance. 

vn1. Perform a Squib Circuit Test in accordance with Appendix 2 of this Service Bulletin. 

JX. Perform a Pressure Switch Test in accordance with Appendix 2 of this Service 

Bulletin. 

x. If the Squib Circuit and Pressure Switch tests are successful, proceed to Step D of 

this SB 

xi. If the Squib Circuit and Pressure Switch tests fail, contact AAE LTD at 816-228-3322 

for assistance. 

D. Return the airplane to its original condition. 

(12) Open the CARGO SMOKE CONTROL/FAULT PNLS circuit breaker and install a DO-NOTCLOSE tag. 

(13) Disconnect the squib connectors from the squib tester 

(14) Mate BTL 1's Harness (09494) "BTL 1 Squib, P/N TFC03-0255-102" to BTL 1's Squib 

connector. 

(15) Mate BTL 2's Harness (D9497) "BTL 2 Squib, P/N TFC03-0255-104" to BTL 2's Squib 

connector. 

(16) Reinstall the cargo compartment bulkhead and seal all seams with approved fire-proof 

tape. 

(17) Remove the "DO-NOT-CLOSE" tag and close the CARGO SMOKE CONTROL/FAULT PNLS 

circuit breaker. 

{18) Set aircraft power as necessary. 

(19) Proceed to Step E of this SB 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 12 of 17 
SERVICE BULLETIN INSTRUCTIONS (Cont.) 

E. RC- Make an entry in the affected aircrafts permanent maintenance records that th is Service Bulletin 

was accomplished, including the date, location, and organization. 

F. Complete the information below for the affected aircraft and send a copy ofthis SB to AAE LTD at P.O. 

Box 1117, Blue Springs, MO. 64013-1117. 

Aircraft Model Number 

I 

Aircraft Seriaf""-

Number 

AAE Kit Part Number l AAE Kit Serial Number I 

-'---··--·········--·"··--

This Service Bulletin WAS accomplished on the aircraft specified above by: 

[ Na~~....... .. I Addre~~ ____ .. ___ ----- -~r Phone ----·----------~1 ··-~_il ____ -·=1 

This Service Bulletin WAS NOT accomplished on the aircraft specified above because the aircraft 

has 

been "Scrapped" by: 

[_N_a_m_e _______________ .~A_d_d re_s s ___ ~·:= ==-----_[ Ph.~6~ ...... ---~ Email ·----~ 

-------=------- ..... .. . L.... -------'--=~-· ___ _J 

Name: _______________________ _ 

(Printed) 

Signatu re: _________ _ 

Date: ____________ _ 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 13 of 17 
APPENDIX 1 

BTL2 EXTENSION HARNESS BUILD-UP, NOTES, MATERIAL LIST, WIRES AND LABELS 

~•m> 

~ ,.,.,_,. 

,!') ~ .l r' I 

Figure 1. Bottle 2 Extension Harness 

o Numbers outlined with a Triangle correspond to the "Notes" section on Page 15 

U.W1 

..... 

oa::r--

N- .-< 

0 1:-

0 0 0 th ·v; -:7 

N ·- .-< • > 

0 Q,J QJ 

.... a: bO 

<( 111 

u. a.. 

tc 

·.;::; ~ :::> 

[Q 

<U 

u 

·;:;; 

... 

QJ 

Vl 
APPENDIX 1 (Cont.) 

BTL2 EXTENSION HARNESS BUILD-UP. NOTES. MATERIAL LIST, WIRES AND LABELS 

Appendix 1, Figure 1 Not es: 

L Bag Harness and label bag 

2. Using the cut and marked wires identified in the appropriate list shown in Table 1 below, assemble the harnesses as 

shown. Terminate the wires in the connector; per Table 1 below. For wires and parts that are not terminated at time of 

build up (Loose Parts), bag these items separately and attach bags by the connector on the harness assembly. These loose 

parts will be installed at time of installation . 

3. Identify harness with heat shrink label item No. 12 at connector ends per Table 2 below. Use 10 or 12 point Helvetica font, 

black letters on heat shrink label Item No. 12. 

4. Bag and label loose parts by part number. 

5. Perform a complete continuity test of wire terminations as shown b\' the wire list specified in Table 1 below. Verify each 

wire is electrically isolated (I.e. no continuity) from all the other wires in the assembly. 

6. Install supplied heat shrink, P/N FIT221-1-1/2(CLR), qty 2, over the Bottle 2 Extension Harness connectors that attach to 

Bottle 2 Harness. Apply heat to shrink around connectors. 

7. Protect connector from contamination during sh ipping and handling (dust caps preferred). 

Bottle 2 Extension Harness Material List 

Item No. Description Part No. or Identifying No. Qty Req'd 

1 Connector (09497) 

2 Backshell, Size 10, RT 

3 Connector (09496) 

4 Backshell, Size 10, RT 

5 Connector (09497) 

6 Backshell, Straight 

7 Connector (09496) 

8 Backshell, Straight 

9 lacing Cord (Type V, Sz 2, Finish C 

10 Wire, 1 Cond. 20 AWG 

11 Terminal, Ring 1110 

12 Heat Shrink, 1/8" Label (2 inch) 

13 Terminal, Ring #6 

14 Heat Shrink, 11/2", Clr (4 inch) 

MS24266R10BSSN 

GTR21-10CO 

M83723/86R1005N 

M85049/51-1-10N 

M24264R10BSPN 

MS27291-1 

M83723/85R1005N 

M85049/52-1·10N 

MIL-T73735B 

MIL-W-22759/16-20-9 

36154 

98-WT31·0342 

36152 

FIT221-l-1/2(CLR) 

1 

1 

1 

1 

1 

1 

1 

1 

As Req 'd 

per Table 1 

4 

13 

1 

2 

Service Bullet in TFA10-26-0020 

Revision IR 

Page 15 of 17 
Item No. 

2 

3 

4 

5 

6 

APPENDIX 1 (Cont.) 

BTL 2 EXTENSION HARNESS BUILD-UP, NOTES, MATERIAL LIST, WIRES AND LABELS 

Table 1. Wire List 

V"llre 

W ire length Termination 

Wire Number V\'ir~ Type Color (Inches) From Pin Code 

W9432 03~·20 tJl IL-W-22 75 9/16-20-9 White v 

~" 09497 T 

W9432 050-20 Mll-W-22759/16-20-9 VVhit.Q 36 09496 T 

W9443-001-20 M IL-W'-2 2759/ 16-20-9 White 84 09496 

W9448-002-20 MIL·W -22759/ lG-20-9 \:Vhite 84 09496 Backshell T 

W9449-001-20 M IL-W · 22759/ 16-20·9 \:Vhit e 84 09497 T 

W9~49 002-20 MIL-W-22759/16-20-9 White 84 D9497 3 T 

Table 2. Labels 

Label 

Btl 2 Extension Harness 

Bottle 2 Sq uib TFC03 -0255·104 

Bottle 2 Pressure Switch TFC03-0255-104 

D9496 

09497 

To 

09497 

09496 

GD9184-DC 

GD91S5-S 

GD9182 -DC 

GD91.83 -S 

Qty 

Req'd 

1 

2 

2 

2 

2 

Pin 

2 

Termina tion 

Code Function Wire Style 

Single 

T Bottle 2 Squib Conduc<or 

Bottle 2 Pressure Single 

T Switch Cor1ductor 

Press. Sw Btl 2 Sinr,le 

u GD-DC Conductor 

Press. Sw Btl 2 Single 

u GDS Conductor 

Squ ib Btl 2 GD· Single 

u DC Condt•ctor 

Single 

u Squi b Btl 2 GD·S Conductor 

Service Bulletin TFAl0-26·0020 

Revision IR 

Page 16 of 17 
APPENDIX 2 

PROCEDURES TO COMPLETE A 

SQUIB CIRCUIT TEST AND PRESSURE SWITCH TEST ON BTll AND BTL2 

To accomplish a "Squib Circuit Test" - Refer to AAE System Maintenance Manual, TFA18-0207, Chapter 

26-23-00, Fire Suppression System- Adjustment/Test, Code 6, Page 501, Revision IR dated 11/25/09, or 

later FAA approved revision, and complete Section 2. "Squib Circuit Test" 

To accomplish a "Pressure Switch Test" - Refer to AAE System Maintenance Manual, TFA18-0207, 

Chapter 26-23-00, Fire Suppression System- Adjustment/Test, Code 6, Page 501, Revision IR dated 

11/25/09, or later FAA approved revision, and complete Section 3. "Pressure Switch Test". 

NOTE: Some of the steps in the above test procedures have already been accomplished in earlier steps of 

this SB and are redundant. Or they are not necessary to complete as part of this SB. The steps in the 

above test procedures are typical for a scheduled maintenance visit and assume access to the AAE Cargo 

FPS Suppression Rack and its components still need to be gained. 

Contact AAE, LTD for a current copy of TFA18-0207 

Service Bulletin TFAl0-26-0020 

Revision IR 

Page 17 of 17