Installation of the Cartridge of the Cargo Fire-Extinguisher Bottle

TASK 26-23-42-400-004-A
Installation of the Cartridge of the Cargo Fire-Extinguisher Bottle

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

WARNING: DO NOT REMOVE/INSTALL THE DISCHARGE HEAD WITH THE CARTRIDGE INSTALLED.

WARNING: MAKE SURE THAT THE MAXIMUM PERMITTED LIFE (MPL) OF THE CARTRIDGE IS LONGER THAN THE TIME TO THE NEXT SCHEDULED DISCARD OF THE CARTRIDGE.

ZONE: 150
ZONE: 160
ZONE: 170
FIN: 4016WX ** ON A/C NOT FOR ALL
FIN: 4018WX ** ON A/C NOT FOR ALL
FIN: 4021WX ** ON A/C NOT FOR ALL
FIN: 4023WX ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ELECTRICALLY GROUNDED WRIST STRAP
No specific	Torque wrench: range to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )
No specific	Torque wrench: range to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
150	AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT
160	BULK CARGO COMPARTMENT AFT BULKHEAD OF AFT CARGO COMPARTMENT TO AFT BULKHEAD OF BULK CARGO COMPARTMENT
170	AFT CAB U/FLOOR COMPT AFT BHD OF BULK
826
161DW
162AW

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
2	O-RING	AIPC 26-23-42-02-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 24-42-00-861-001-A	Energize the Ground Service Network from the External Power
TASK 24-42-00-862-001-A	De-energize the Ground Service Network Supplied from the External Power
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
TASK 25-55-12-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-400-003-A	Installation of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65
TASK 26-23-00-710-001-A	Operational Test of the Cargo-Compartment Fire-Extinguishing System
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 26-23-00-00	CARGO COMPARTMENT FIRE EXTINGUISHING - DESCRIPTION AND OPERATION
Cartridge - Cargo Fire-Extinguisher Bottle

3. Job Set-up
Subtask 26-23-42-860-052-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized (Ref. AMM TASK 24-42-00-861-001).

Subtask 26-23-42-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/CARGO FIRE/EXTIG/BTL2	8WX	C04
49VU	AIR COND/CARGO FIRE/EXTIG/BTL1	1WX	C03
** ON A/C NOT FOR ALL
122VU	AIR COND/CARGO/FIRE/EXTIG	1WX	T19

Subtask 26-23-42-010-055-A ** ON A/C NOT FOR ALL

C. Get Access

Cartridge - Cargo Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL

(1) For the location of this component, refer to Para. Component Location (Ref. AMM D/O 26-23-00-00).
(2) Make sure that the aft cargo-compartment door 826 is open (Ref. AMM TASK 52-30-00-860-001).
(3) Make sure that the CARGO COMPT LIGHT switch 8LU is in the ON position.
(4) Make sure that the protection panel 162AW is removed (Ref. AMM TASK 25-55-12-000-003).
(5) Make sure that the shunt-device is installed on the cartridges (4).

Subtask 26-23-42-010-055-B ** ON A/C NOT FOR ALL

C. Get Access

Cartridge - Cargo Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL

(1) For the location of this component, refer to Para. Component Location (Ref. AMM D/O 26-23-00-00).
(2) Make sure that the aft cargo-compartment door 826 is open (Ref. AMM TASK 52-30-00-860-001).
(3) Make sure that the CARGO COMPT LIGHT switch 8LU is in the ON position.
(4) Make sure that the partition panel 161DW is removed (Ref. AMM TASK 25-55-12-000-001).
(5) Make sure that the shunt-device is installed on the cartridges (4).

4. Procedure
Subtask 26-23-42-420-053-A ** ON A/C NOT FOR ALL

A. Installation of the Cartridges

Cartridge - Cargo Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL

NOTE: The installation procedure is the same for cartridges 4016WX, 4018WX, 4021WX and 4023WX.

(1) Make sure that you are grounded with the ELECTRICALLY GROUNDED WRIST STRAP.

WARNING: DO NOT TOUCH THE FRANGIBLE DISC IN THE FIRE EXTINGUISHER BOTTLE. DAMAGE TO THE FRANGIBLE DISC CAN CAUSE UNWANTED DISCHARGE AND INJURY TO PERSONS.

(2) Remove the PLUG - BLANKING from the discharge head (1).
(3) Install the cartridge (4) as follows:

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.

(a) Install the ground lug bolt (7) on the cartridge (4).
(b) Install the new AIPC 26-23-42-02-050 O-RING (2).
(c) Loosely install the cartridge (4) in the discharge head (1).
(d) TORQUE the cartridge (4) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN )

.
(e) Loosely install the bonding strap (3) and the nut (6) on the ground lug bolt (7) (Ref. AMM TASK 20-28-00-912-802).
(f) TORQUE the nut (6) to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )

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.

(g) Safety the cartridge (4) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

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.

(4) Connect the electrical connector (5) as follows:
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.

(b) Remove the shunt plug from the cartridge (4).

CAUTION: MAKE SURE THAT THE BONDING STRAP(S) IS(ARE) CONNECTED BEFORE YOU CONNECT THE ELECTRICAL CONNECTOR(S).

(d) Safety the electrical connectors (5) with 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.

Subtask 26-23-42-865-059-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/CARGO FIRE/EXTIG/BTL2	8WX	C04
49VU	AIR COND/CARGO FIRE/EXTIG/BTL1	1WX	C03
** ON A/C NOT FOR ALL
122VU	AIR COND/CARGO/FIRE/EXTIG	1WX	T19

Subtask 26-23-42-710-051-A ** ON A/C NOT FOR ALL

C. Test
(1) Do an operational test of the cargo-compartment fire-extinguishing system (Ref. AMM TASK 26-23-00-710-001).

5. Close-up
Subtask 26-23-42-410-055-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the sidewall panel 162AW (Ref. AMM TASK 25-55-12-400-003).
(3) Set the CARGO COMPT LIGHT switch 8LU to the OFF position.
(4) Close the aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).

Subtask 26-23-42-410-055-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the partition panel 161DW (Ref. AMM TASK 25-55-12-400-001).
(3) Set the CARGO COMPT LIGHT switch 8LU to the OFF position.
(4) Close the aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).

Subtask 26-23-42-862-053-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) De-energize the ground service network (Ref. AMM TASK 24-42-00-862-001).

[Rev.10 from 2021] 2026.03.31 23:46:43 UTC