Removal of the Fire-Extinguisher Bottle Cartridge

TASK 26-22-42-000-001-A
Removal of the Fire-Extinguisher Bottle Cartridge

WARNING: THE CARTRIDGE IS AN EXPLOSIVE DEVICE. REMOVE IT BEFORE YOU DISASSEMBLE THE FIRE EXTINGUISHER BOTTLE. TO PREVENT INJURY TO THE PERSONNEL BECAUSE OF THE EXPLOSION OF THE CARTRIDGE IF IT HAS NOT BEEN FIRED:

INSTALL A SHUNT DEVICE.
THIS WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE BEFORE ITS REMOVAL.

DO NOT USE A FOIL SHUNT.

FIN: 12WF

1. Reason for the Job
Removal of the fire extinguisher bottle.
Removal because of MPL.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	1	BAG - ELECTROSTATIC SAFETY
No specific	AR	CAP - BLANKING
No specific	1	FLASHLIGHT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
6971-0010	1	CAP SHUNT-FIRE BOTTLE
MS25043-10DA	1	CARTRIDGE CAP

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
314AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 52-41-23-010-801-A	Opening of Access Door 314AR
Fire - Extinguisher Bottle Cartridge ** ON A/C NOT FOR ALL
Fire - Extinguisher Bottle Cartridge ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 26-22-42-865-050-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	APU/FIRE AND OVHT/DET/LOOP B	2WG	L44
121VU	APU/FIRE AND OVHT/DET/LOOP A	1WG	L43
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41

Subtask 26-22-42-941-050-A

B. Put a WARNING NOTICE(S) in position on panel 25VU to tell persons not to operate the APU.

Subtask 26-22-42-010-050-A

C. Get Access

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

(1) Put on and attach a safety harness before you start work in the work area
(2) Put an ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below access door 314AR.
(3) Open access door 314AR and safety it in the open position.
(Ref. AMM TASK 52-41-23-010-801).
(4) If necessary, use a FLASHLIGHT.

4. Procedure
Subtask 26-22-42-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Fire-Extinguisher Bottle Cartridge (12WF)

WARNING: BEFORE YOU TOUCH THE POWER DEVICE CARTRIDGE, MAKE SURE THAT YOU ARE GROUNDED AND THAT YOU INSTALL A SHUNT DEVICE ON IT. USE A CAP OR PLUG AS SHUNT DEVICE (THE CAP OR PLUG WILL SHUNT THE PINS TOGETHER ON THE CARTRIDGE). DO NOT USE A FOIL SHUNT. IF YOU TOUCH A POWER DEVICE CARTRIDGE THAT DOES NOT HAVE A SHUNT DEVICE INSTALLED, AN EXPLOSION CAN OCCUR AND CAUSE INJURIES TO YOU.

(1) Remove the nut (6), the bonding strap (5) and the washer (4).
(2) Remove and discard the safety wire from the cartridge (2).
(3) Disconnect the electrical connector (1) from the cartridge (2).
(4) Install the MS25043-10DA CARTRIDGE CAP to the cartridge (2).
(5) Put the cartridge in a BAG - ELECTROSTATIC SAFETY.
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Remove the cartridge (2) together with the bonding lug (3).
(8) Remove and discard the 0-ring (7) from the cartridge (2).

Subtask 26-22-42-020-050-B ** ON A/C NOT FOR ALL

A. Removal of the Fire-Extinguisher Bottle Cartridge (12WF)

(1) Remove the nut (6), the bonding strap (5) and the washer (4).
(2) Remove and discard the safety wire from the cartridge (2).
(3) Disconnect the electrical connector (1) from the cartridge (2).
(4) Install the 6971-0010 CAP SHUNT-FIRE BOTTLE or CAP SHUNT-FIRE BOTTLE (CEC-10) to the cartridge (2).
(5) Put the cartridge in a BAG - ELECTROSTATIC SAFETY.
(6) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(7) Remove the cartridge (2) together with the bonding lug (3).

[Rev.10 from 2021] 2026.03.31 23:45:41 UTC