Installation of the Engine Fire-Extinguisher Bottle

TASK 26-21-41-400-001-F
Installation of the Engine 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: 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 INSTALLATION, MAKE SURE THAT:

THE EXTINGUISHER BOTTLE, DISCHARGE HEAD AND CARTRIDGE ARE FROM THE SAME VENDOR, AND
THE PART NUMBERS ARE THE ONES SPECIFIED IN THE IPC.

ZONE: 415
ZONE: 425
FIN: 6WE1
FIN: 6WE2
FIN: 8WE1
FIN: 8WE2

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )
No specific	Torque wrench: range to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )
98D27803000000	AR	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
415	LOWER PYLON
425	LOWER PYLON
FOR [6WE1] (BOTTLE 1-FIRE EXTING, ENG 1)
415BL
FOR [6WE2] (BOTTLE 1-FIRE EXTING, ENG 2)
425BL
FOR [8WE1] (BOTTLE 2-FIRE EXTING, ENG 1)
415CR
FOR [8WE2] (BOTTLE 2-FIRE EXTING, ENG 2)
425CR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
13	SEAL	AIPC 26-21-86-52-150
13	SEAL	AIPC 26-21-86-53-150

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-15-00-910-001-A	Handling Precautions for Electrostatic Discharge Sensitive Devices
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 26-12-00-710-001-A	Operational Check of Loop/Squib
TASK 26-21-00-710-002-A	Operational Check of Engine-Bottle Low-Pressure Indicating-Circuit
TASK 26-21-41-280-001-A	Weight Check of the Engine Fire-Extinguisher Bottle
TASK 26-21-41-400-002-C	Installation of the Discharge Head of the Engine Fire-Extinguisher Bottle
TASK 26-21-41-400-004-D	Installation of the Cartridge of the Engine Fire-Extinguisher Bottle
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-803-A	Installation of the Pylon Lateral Access-Doors
Access Door Supports
Engine Fire-Extinguisher Bottle

3. Job Set-up
Subtask 26-21-41-860-060-A

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE/CRANK/NORM/IGN/START selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Make sure that WARNING NOTICE(S) are in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(3) On the ENG section of overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(4) On FLAPS panel 114VU:
(a) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
(5) Make sure that a WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.
(6) Make sure that the M83723-60-18AN CAP, PROTECTIVE is installed on the cartridge (11).

Subtask 26-21-41-280-057-A

B. Weight Check
(1) Do a weight check of the engine fire-extinguisher bottle (Ref. AMM TASK 26-21-41-280-001).

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

Subtask 26-21-41-875-066-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 6WE2 (BOTTLE 1FIRE EXTING, ENG 2) FOR FIN: 6WE1 (BOTTLE 1FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
FOR FIN: 8WE2 (BOTTLE 2FIRE EXTING, ENG 2) FOR FIN: 8WE1 (BOTTLE 2FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40

Subtask 26-21-41-010-067-A

D. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the pylon.
(2) Make sure that the pylon lateral access-doors are removed (Ref. AMM TASK 54-51-21-000-804):
(a) FOR [6WE1] (BOTTLE 1-FIRE EXTING, ENG 1)

415BL.

(b) FOR [8WE1] (BOTTLE 2-FIRE EXTING, ENG 1)

415CR.

425BL.

(d) FOR [8WE2] (BOTTLE 2-FIRE EXTING, ENG 2)

425CR.

(3) Make sure that the access door supports (2) are removed from the structure (3).

Access Door Supports

Subtask 26-21-41-420-072-A

E. Installation of the Equipment
(1) Install the discharge head of the engine fire-extinguisher bottle (Ref. AMM TASK 26-21-41-400-002).
(2) Install the cartridge of the engine fire-extinguisher bottle (Ref. AMM TASK 26-21-41-400-004).

4. Procedure
Subtask 26-21-41-420-073-B

A. Installation of the Engine Fire-Extinguisher Bottle

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.

(1) Do an inspection of the component interfaces and the adjacent area.
(2) Clean the component interfaces and the adjacent area.
(3) Remove the remaining sealant from the mating surfaces of the fire extinguisher bottle (5) and the supports (8) (Ref. AMM TASK 20-28-00-912-802).
(4) Install the bottle (5):

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) Prepare for electrical bonding of the fire extinguisher bottle (5) at the supports (8) (Ref. AMM TASK 20-28-00-912-802).
(b) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the mating surfaces of the supports (8).
(c) Put the fire extinguisher bottle (5) with the installed discharge head and cartridge assembly on the supports (8) and (9).
(5) Install the four washers (3) and the four bolts (4).
(6) TORQUE the bolts (4) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )

.
(7) Remove the PLUG-BLANKING from each disconnected line end.
(8) Install a new AIPC 26-21-86-52-150 SEAL (13) for the left pylon or a new AIPC 26-21-86-53-150 SEAL (13) for the right pylon on line (1) end fitting.
(9) Connect the line (1) to the discharge head (12).
(10) Install the coupling (2) on the line (1).
(11) TORQUE the bolt of the coupling (2) to between 70 and 55 lbf.in (0.79 and 0.62 m.daN )

Subtask 26-21-41-081-054-A

B. Removal of the Safety Tool

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.

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) Before you touch the cartridge, do the procedure for devices that are sensitive to electrostatic discharge (Ref. AMM TASK 20-15-00-910-001).
(2) Remove the M83723-60-18AN CAP, PROTECTIVE from the cartridge (11).

Subtask 26-21-41-420-074-A

C. Connect the Electrical Connectors
(1) Remove the CAP-BLANKING from each electrical connector and receptacle.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Connect the electrical connector (10) to the cartridge (11).
(4) Connect the electrical connector (6) to the pressure switch (7).
(5) Complete the bonding procedure at the supports (8) (Ref. AMM TASK 20-28-00-912-802).

5. Close-up
Subtask 26-21-41-875-067-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 6WE2 (BOTTLE 1FIRE EXTING, ENG 2) FOR FIN: 6WE1 (BOTTLE 1FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
FOR FIN: 8WE2 (BOTTLE 2FIRE EXTING, ENG 2) FOR FIN: 8WE1 (BOTTLE 2FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40

Subtask 26-21-41-710-054-A

B. Do these Test
(1) Do an operational check of the loop/squib (Ref. AMM TASK 26-12-00-710-001).
(2) Do an operational check of the low-pressure indicating circuit (Ref. AMM TASK 26-21-00-710-002).

Subtask 26-21-41-410-064-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access door supports.

Access Door Supports

(a) Put the access door supports (2) in position on the structure (3).
(b) Install the screws (1) and tighten them.
(3) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-803):
(a) FOR [6WE1] (BOTTLE 1-FIRE EXTING, ENG 1)

415BL.

(b) FOR [8WE1] (BOTTLE 2-FIRE EXTING, ENG 1)

415CR.

425BL.

(d) FOR [8WE2] (BOTTLE 2-FIRE EXTING, ENG 2)

425CR.

(4) Remove the access platform(s).
(5) Remove the WARNING NOTICE(S).

Subtask 26-21-41-862-052-A

D. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:44:59 UTC