Removal of the Fire Extinguisher Bottle

TASK 26-22-41-000-001-A
Removal of the Fire Extinguisher Bottle

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

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.

WARNING: BE VERY CAREFUL WHEN YOU MOVE A FULL FIRE EXTINGUISHER BOTTLE. A SUDDEN OR HEAVY SHOCK TO A FULL BOTTLE CAN CAUSE UNWANTED DISCHARGE AND INJURY TO PERSONS.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 11WF

1. Reason for the Job
Self explanatory
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	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
30840002	1	CAP,PROTECTIVE-FIRE EXTINGUISHER SYSTEM
324467	1	CAP,PROTECTIVE-FIRE EXTINGUISHER SYSTEM

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
314AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 26-22-42-000-001-A	Removal of the Fire-Extinguisher Bottle Cartridge
TASK 52-41-23-010-801-A	Opening of Access Door 314AR
Fire - Extinguisher Bottle for Meggitt Assembly
Fire - Extinguisher Bottle for Kidde Assembly

3. Job Set-up
Subtask 26-22-41-941-050-A

A. Safety Precautions
(1) Put a WARNING NOTICE(S) in position on overhead panel 25VU to tell the persons not to operate the APU.
(2) Put a WARNING NOTICE(S) in position in the cockpit to tell persons not to operate the pitch controls.

Subtask 26-22-41-865-050-A

B. 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 26-22-41-010-050-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 maintenance door 314AR.
(3) Open access door 314AR and safety it in the open position.
(Ref. AMM TASK 52-41-23-010-801).
(4) Set the light switch to on.

4. Procedure
Subtask 26-22-41-020-054-A

A. Removal of the Fire-Extinguisher Bottle (11WF) for Meggitt Assembly
(1) Remove the fire-extinguisher-bottle cartridge (11) from the fire-extinguisher bottle (17) (Ref. AMM TASK 26-22-42-000-001).
(2) Removal of the fire-extinguisher discharge outlet (10) and the spray tubing (12):

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(a) Removal of the lockwire:
1 Remove and discard the lockwire from the discharge outlet (10), the swivel nut (9) and the couplings of the spray tubing (12).
(b) Remove the clamp (13).
(c) Hold the spray tubing (12) in position, loosen the nuts (18) on the spray tubing (12) and the discharge outlet (10) and move them back.
(d) Hold the spray tubing (12) in position, loosen the swivel nut (9). Do not remove the discharge outlet (10) from the fire extinguisher bottle (17).
(e) Remove the spray tubing (12).
(f) Remove and discard the O-rings (19) from the spray tubing (12).
(g) Remove and discard the O-ring (8) from the discharge outlet (10).
(h) Remove the bushing (20).
(i) Hold the discharge outlet (10) in position, loosen the swivel nut (9) completely and then remove the discharge outlet (10).
(j) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the fire-extinguisher bottle (17):

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(a) Disconnect the electrical connector (16) from the pressure switch on the fire-extinguisher bottle (17).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Release the nut (15) and move the overboard pipe (14) away from the fire-extinguisher bottle (17).
(d) Put the PLUG-BLANKING in each disconnected line end.
(e) Remove the nut (6), the bolt (3), the washers (4) and the bonding strap (5).
(f) Remove the nuts (7), the bolts (1) and the washers (2).
(g) Install a 30840002 CAP,PROTECTIVE-FIRE EXTINGUISHER SYSTEM on the fire-extinguisher bottle (17).

NOTE: Because of the interchangeability, there are two different bottle suppliers. Install the protective cap supplied by bottle vendor.

(h) Remove the fire-extinguisher bottle (17).

Subtask 26-22-41-020-057-A

B. Removal of the Fire-Extinguisher Bottle (11WF) for Kidde Assembly
(1) Remove the fire-extinguisher-bottle cartridge (18) from the fire-extinguisher bottle (19) (Ref. AMM TASK 26-22-42-000-001).
(2) Removal of the fire-extinguisher discharge outlet (12) and the spray tubing (13):
(a) Removal of the lockwire:

1 Remove and discard the lockwire from the discharge outlet (12), the swivel nut (11) and the couplings of the spray tubing (13).
(b) Remove the clamp (14).
(c) Hold the spray tubing (13) in position, loosen the nuts (17) on the spray tubing (13) and the discharge outlet (12) and move them back.
(d) Hold the spray tubing (13) in position, loosen the swivel nut (11) but do not remove the discharge outlet (12) from the fire-extinguisher bottle (19).
(e) Remove the spray tubing (13).
(f) Remove and discard the O-rings (16) from the spray tubing (13) and the discharge outlet (12).
(g) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the fire-extinguisher bottle (19):

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(a) Remove the screw (3B), move the switch guard (3A) back and disconnect the electrical connector (3) from the pressure switch on the fire-extinguisher bottle (19).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Release the nut (2) and move the overboard pipe (1) away from the fill-and-safety fitting of the fire-extinguisher bottle (19).
1 Put the PLUG-BLANKING in each disconnected line end.
2 Put a CAP - BLANKING on the fill-and-safety fitting of the fire-extinguisher bottle (19).
(d) Remove the nut (10), the bolt (7), the washer (9) and the bonding strap (8).
(e) Remove the nuts (4), the bolts (6) and the washers (5).
(f) Put the 324467 CAP,PROTECTIVE-FIRE EXTINGUISHER SYSTEM on the swivel nut (11).
(g) Tighten the 324467 CAP,PROTECTIVE-FIRE EXTINGUISHER SYSTEM with your hand.
(h) Remove the fire-extinguisher bottle (19).

[Rev.10 from 2021] 2026.03.31 23:45:37 UTC