Removal of the Cargo Fire-Extinguisher Bottle

TASK 26-23-42-000-001-A
Removal of the Cargo Fire-Extinguisher Bottle

WARNING: BE CAREFUL WHEN YOU REMOVE OR INSTALL THIS EQUIPMENT. THIS EQUIPMENT IS HEAVY (MORE THAN 12 KG (26.5 lb)) AND CAN CAUSE INJURY AND/OR DAMAGE.

WARNING: IF YOU REMOVE THE FIRE EXTINGUISHER BOTTLES IN A CLOSED HANGAR, MAKE SURE THAT THERE IS A FLOW OF NEW AIR IN THE HANGAR.

CAUTION: BEFORE YOU INSTALL/REMOVE THE GSE-TOOL, READ THE INSTRUCTIONS IN THE APPLICABLE GSE INSTRUCTION MANUAL. WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT OBEY THE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.

ZONE: 150
ZONE: 160
ZONE: 170
FIN: 4015WX ** ON A/C NOT FOR ALL
FIN: 4020WX ** ON A/C NOT FOR ALL

1. Reason for the Job

NOTE: Two persons are necessary to do this task.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CAP - BLANKING
No specific	AR	ELECTRICALLY GROUNDED WRIST STRAP
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
10-101950-81	AR	SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-42-00-861-001-A	Energize the Ground Service Network 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 26-23-00-200-005-A	Restoration of the Fire Extinguishing System (FES) after Activation
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 26-23-00-00	CARGO COMPARTMENT FIRE EXTINGUISHING - DESCRIPTION AND OPERATION
Cargo Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL
Cargo Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL
Cargo Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 26-23-42-861-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the ground service network (Ref. AMM TASK 24-42-00-861-001).

Subtask 26-23-42-860-055-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Energize the ground service network
(Ref. AMM TASK 24-42-00-861-001).
(2) If the fire extinguishing agent is released before the installation of the cargo fire-extinguisher bottle:

Do the restoration of the fire extinguishing system after activation (Ref. AMM TASK 26-23-00-200-005).

Subtask 26-23-42-865-050-A ** ON A/C NOT FOR ALL

C. Open, safety and tag 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 26-23-42-010-050-A ** ON A/C NOT FOR ALL

D. Get Access
(1) For the location of this component, refer to Para. Component Location (Ref. AMM D/O 26-23-00-00).
(2) Open the aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(3) Set the CARGO COMPT LIGHT switch 8LU to the ON position.
(4) Remove the sidewall panel 162AW (Ref. AMM TASK 25-55-12-000-003).

Subtask 26-23-42-010-050-B ** ON A/C NOT FOR ALL

D. Get Access
(1) For the location of this component, refer to Para. Component Location (Ref. AMM D/O 26-23-00-00).
(2) Open the aft cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(3) Set the CARGO COMPT LIGHT switch 8LU to the ON position.
(4) Remove the partition panel 161DW (Ref. AMM TASK 25-55-12-000-001).

4. Procedure
Subtask 26-23-42-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Cargo Fire-Extinguisher Bottle

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.

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

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

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.

(2) Remove and discard the lockwire from the electrical connectors (21).
(3) Disconnect the electrical connectors (21) 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) Disconnect the electrical connectors (21) from the cartridges (22).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Put the 10-101950-81 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL (20) on the cartridges (22).

(4) Remove and discard the lockwire from the cartridges (22).

CAUTION: MAKE SURE THAT THE ELECTRICAL WIRE(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(5) Remove the nuts (23) and the bonding straps (24) from the ground lug bolts (25).
(6) Disconnect the electrical connector (2) from the pressure switch (3).
(7) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(8) Loosen the nuts (5) and disconnect the flexible hoses (4) from the discharge heads (19):
(a) Do not remove the safety beaded chain that is installed on the flexible hoses (4). This prevents the cross-connection of the cartridge electrical connectors.
(9) Put the PLUG - BLANKING on the disconnected line ends and the discharge heads (19).
(10) Loosen the nut (15) and disconnect the flexible hose (14) from the safety relief valve (7).
(11) Put the PLUG - BLANKING on the disconnected line end and the safety relief valve (7).
(12) Remove the nut (8) and the bolt (9) and then move the tie-rod (10) away from the fire extinguisher bottle (1).
(13) Remove the fire extinguisher bottle (1) as follows:

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.

(a) Hold the fire extinguisher bottle (1) and remove the nuts (17) and the bolts (6).
(b) Remove the fire extinguisher bottle (1) and put it on an applicable support.

Subtask 26-23-42-020-050-G ** ON A/C NOT FOR ALL

A. Removal of the Cargo Fire-Extinguisher Bottle

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.

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

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

(2) Remove and discard the lockwire from the electrical connectors (22).
(3) Disconnect the electrical connectors (22) as follows:

(a) Disconnect the electrical connectors (22) from the cartridges (23).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Put the 10-101950-81 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL (21) on the cartridges (23).

(4) Remove and discard the lockwire from the cartridges (23).

CAUTION: MAKE SURE THAT THE ELECTRICAL WIRE(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(5) Remove the nuts (24) and the bonding straps (25) from the ground lug bolts (26).
(6) Disconnect the electrical connector (2) from the pressure switch (3).
(7) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(8) Loosen the nuts (5) and disconnect the flexible hoses (4) from the discharge heads (20):
(a) Do not remove the safety beaded chain that is installed on the flexible hoses (4). This prevents the cross-connection of the cartridge electrical connectors.
(9) Put the PLUG - BLANKING on the disconnected line ends and the discharge heads (20).
(10) Loosen the nut (14) and disconnect the flexible hose (13) from the safety relief valve (15).
(11) Put the PLUG - BLANKING on the disconnected line end and the safety relief valve (15).
(12) Remove the nut (8) and the bolt (6) and then move the tie-rod (9) away from the fire extinguisher bottle (1).
(13) Remove the fire extinguisher bottle (1) as follows:

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.

(a) Hold the fire extinguisher bottle (1) and remove the nuts (18), the washers (17) and the bolts (7).
(b) Remove the fire extinguisher bottle (1) and put it on an applicable support.

Subtask 26-23-42-020-050-I ** ON A/C NOT FOR ALL

A. Removal of the Cargo Fire-Extinguisher Bottle

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.

CAUTION: MAKE MATCH MARKS ON ALL THE ELECTRICAL WIRES BEFORE YOU DISCONNECT THEM. INCORRECT CONNECTION OF WIRES WILL CAUSE DAMAGE TO EQUIPMENT.

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

(2) Remove and discard the lockwire from the electrical connectors (23).
(3) Disconnect the electrical connectors (23) as follows:

(a) Disconnect the electrical connectors (23) from the cartridges (21).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Put the 10-101950-81 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE,HTL (22) on the cartridges (21).

(4) Remove and discard the lockwire from the cartridges (21).

CAUTION: MAKE SURE THAT THE ELECTRICAL WIRE(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(5) Remove the nuts (24) and the bonding straps (25) from the ground lug bolts (26).
(6) Disconnect the electrical connector (2) from the pressure switch (3).
(7) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(8) Loosen the nuts (5) and disconnect the flexible hoses (4) from the discharge heads (20).
(9) Put the PLUG - BLANKING on the disconnected line ends and the discharge heads (20).
(10) Loosen the nut (14) and disconnect the flexible hose (13) from the safety relief valve (15).
(11) Put the PLUG - BLANKING on the disconnected line end and the safety relief valve (15).
(12) Remove the nut (8) and the bolt (6) and then move the tie-rod (9) away from the fire extinguisher bottle (1).
(13) Remove the fire extinguisher bottle (1) as follows:

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.

(a) Hold the fire extinguisher bottle (1) and remove the nuts (18), the washers (17) and the bolts (7).
(b) Remove the fire extinguisher bottle (1) and put it on an applicable support.

[Rev.10 from 2021] 2026.03.31 23:46:44 UTC