Installation of the Cargo Fire-Extinguisher Bottle

TASK 26-23-41-400-004-A
Installation 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: MAKE SURE THAT THE MAXIMUM PERMITTED LIFE (MPL) OF THE CARTRIDGE IS LONGER THAN THE TIME TO THE NEXT SCHEDULED DISCARD OF THE CARTRIDGE.

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.

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

ZONE: 130
FIN: 4005WX ** 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	1	ELECTRICALLY GROUNDED WRIST STRAP
No specific	Torque wrench: range to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
No specific	Torque wrench: range to between 4.3 and 3.9 m.daN (31.71 and 28.76 lbf.ft )
No specific	Torque wrench: range to between 6.8 and 5.4 m.daN (50.15 and 39.82 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GEE1)	Synthetic Oil base Grease-Fuel and Oxidized Environment Fluorinated -
(Material No.06AAC1)	Polysulfide Sealant-General Purpose Interfay -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
130	FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX
825
132MW
132SW

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
12	LOCK WASHER	AIPC 26-23-02-02-100

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 25-54-12-000-003-A	Removal of the Sidewall Panels in the Forward Cargo Compartment
TASK 25-54-12-400-003-A	Installation of the Sidewall Panels in the Forward Cargo Compartment
TASK 26-16-00-710-001-A	Operational Check of Cargo Compartment Smoke Detection by PTT
TASK 26-23-00-200-005-A	Restoration of the Fire Extinguishing System (FES) after Activation
TASK 26-23-41-280-001-A	Remove Cargo Compartment Fire Extinguisher Bottle for in shop Weight Check.
TASK 26-23-41-400-005-A	Installation of the Cartridge of the Cargo Fire-Extinguisher Bottle
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
Cargo Fire-Extinguisher Bottle

3. Job Set-up
Subtask 26-23-41-941-059-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) If the installation of the cargo fire-extinguisher bottle is done after a discharge of the fire extinguishing agent:

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

Subtask 26-23-41-860-050-A ** ON A/C NOT FOR ALL

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

Subtask 26-23-41-010-061-A ** ON A/C NOT FOR ALL

C. Get Access
(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 forward cargo-compartment door 825 is open (Ref. AMM TASK 52-30-00-860-001).
(3) Make sure that the CARGO COMPT LIGHT switch 6LU is in the ON position.
(4) Make sure that the sidewall panel 132MW is removed (Ref. AMM TASK 25-54-12-000-003).
(5) Make sure that the cartridge(s) is/are installed on the fire extinguisher bottle (Ref. AMM TASK 26-23-41-400-005).
(6) Make sure that the protective cap is installed on the cartridge(s).
(7) Clean the component interfaces and the adjacent area.
(8) Do an inspection of the component interfaces and the adjacent area.

Subtask 26-23-41-010-061-B ** ON A/C NOT FOR ALL

C. Get Access
(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 forward cargo-compartment door 825 is open (Ref. AMM TASK 52-30-00-860-001).
(3) Make sure that the CARGO COMPT LIGHT switch 6LU is in the ON position.
(4) Make sure that the sidewall panel 132SW is removed (Ref. AMM TASK 25-54-12-000-003).
(5) Make sure that the cartridge is installed on the fire extinguisher bottle (Ref. AMM TASK 26-23-41-400-005).
(6) Make sure that the protective cap is installed on the cartridge.
(7) Clean the component interfaces and the adjacent area.
(8) Do an inspection of the component interfaces and the adjacent area.

Subtask 26-23-41-280-056-A ** ON A/C NOT FOR ALL

D. Weight Check
(1) Do a weight check of the cargo fire-extinguisher bottle (Ref. AMM TASK 26-23-41-280-001).

NOTE: If the cargo fire-extinguisher bottle was weighed in a short time before this installation it is not necessary to weigh it again.

Subtask 26-23-41-865-055-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
122VU	AIR COND/CARGO/FIRE/EXTIG	1WX	T19

4. Procedure
Subtask 26-23-41-420-063-A ** ON A/C NOT FOR ALL

A. Installation of the Cargo Fire-Extinguisher Bottle
(1) Apply Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) to the upper brackets of the fire extinguisher bottle (1).
(2) Install 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) in its correct installation position on the structure (16).
(b) Install the bolts (17), the washers (7) and the nuts (6).
(c) Tighten the nuts (6).
(3) Remove the blanking plugs from the disconnected line ends, the safety relief valve (26) and the discharge heads (19).
(4) Install the discharge heads (19) as follows:

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) If the discharge heads (19) are aligned with the hose assembly, do the steps that follow:
1 Remove and discard the lockwire.
2 Make sure that the discharge heads (19) are aligned with the flexible hoses (4).
3 Torque the coupling nuts (18) to between 6.8 and 5.4 m.daN (50.15 and 39.82 lbf.ft )

.
4 Safety the coupling nuts (18) with the 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

(b) If the discharge heads (19) are not aligned with the hose assembly, do the steps that follow:
1 Remove and discard the lockwire.
2 Loosen the coupling nuts (18).
3 Align the discharge heads (19) with the flexible hoses (4).
4 TORQUE the coupling nuts (18) to between 6.8 and 5.4 m.daN (50.15 and 39.82 lbf.ft )

.
5 Safety the coupling nuts (18) with the 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

CAUTION: APPLY A SMALL QUANTITY OF THE CORRECT GREASE TO THE MALE THREADS OF THE CONNECTIONS. THIS WILL PREVENT DAMAGE TO THE THREADS. MAKE SURE THAT GREASE DOES NOT GO INTO THE PIPES. GREASE IN THE PIPES CAN CAUSE A MALFUNCTION OF THE SYSTEM.

(5) Apply a small quantity of Synthetic Oil base Grease-Fuel and Oxidized Environment Fluorinated - (Material No.03GEE1) to the male threads of the safety relief valve (26) and the discharge heads (19).
(6) Connect the flexible hose (14) to the safety relief valve (26).
(7) TORQUE the nut (15) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(8) Connect the flexible hoses (4) to the discharge heads (19).
(9) TORQUE the nuts (5) to between 4.3 and 3.9 m.daN (31.71 and 28.76 lbf.ft )

.
(10) Install the bonding straps (24) and the nuts (23) on the ground lug bolts (25) (Ref. AMM TASK 20-28-00-912-802).
(11) TORQUE the nuts (23) to between 0.35 and 0.3 m.daN (30.97 and 26.55 lbf.in )

WARNING: DO NOT TOUCH THE CARTRIDGE BEFORE YOU DO THE PROCEDURE APPLICABLE TO DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE THE FIRE EXTINGUISHER BOTTLE TO RELEASE ITS CONTENTS SUDDENLY AND CAUSE INJURY TO PERSONS.

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

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.

(13) Connect the electrical connectors (2) and (21) as follows:
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.

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

(b) Connect the electrical connector (2) to the pressure switch (3).

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.

(c) Remove the protective caps (20) from the cartridges (22) and connect the electrical connectors (21) to the cartridges (22).
(14) Put the eye-end of the tie-rod (10) in position between the lugs on the fire extinguisher bottle (1).
(15) If necessary, adjust the tie-rod as follows:
(a) Loosen the locknut (11) and remove the eye-end of the tie-rod (10) from the rod-end (13).
(b) Remove and discard the lockwasher (12).
(c) Install a new AIPC 26-23-02-02-100 LOCK WASHER (12) and the eye-end of the tie-rod (10) on the rod-end (13).
(d) Adjust the tie-rod (10) until the bolt (9) goes through the eye-end of the tie-rod (10) and the lugs on the fire extinguisher bottle (1).
(e) Tighten the locknut (11).
(f) Safety the locknut (11) with the lockwasher (12).
(16) Install the bolt (9) and the nut (8).
(17) Tighten the nut (8).

Subtask 26-23-41-865-056-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
122VU	AIR COND/CARGO/FIRE/EXTIG	1WX	T19

Subtask 26-23-41-710-051-A ** ON A/C NOT FOR ALL

C. Test
(1) Do the operational test of the cargo-compartment smoke-detection system (Ref. AMM TASK 26-16-00-710-001).

5. Close-up
Subtask 26-23-41-410-052-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 132MW (Ref. AMM TASK 25-54-12-400-003).
(3) Set the CARGO COMPT LIGHT switch 6LU to OFF.
(4) Close the forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).

Subtask 26-23-41-410-052-C ** 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 132SW (Ref. AMM TASK 25-54-12-400-003).
(3) Set the CARGO COMPT LIGHT switch 6LU to OFF.
(4) Close the forward cargo-compartment door 825 (Ref. AMM TASK 52-30-00-860-002).

Subtask 26-23-41-862-050-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 23:46:29 UTC