Removal of the Engine Fire-Extinguisher Bottle

TASK 26-21-41-000-001-A
Removal of the Engine Fire-Extinguisher Bottle

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.

ZONE: 415
ZONE: 425
FIN: 6WE1 ** ON A/C NOT FOR ALL
FIN: 6WE2 ** ON A/C NOT FOR ALL
FIN: 8WE1 ** ON A/C NOT FOR ALL
FIN: 8WE2 ** 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	ACCESS PLATFORM 2M (6 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)
263193	1	SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE
53100141-1	1	PLUG, SHUNT
OR	OR
M83723-60-18AN	1	CAP, PROTECTIVE
73245-02	AR	SAFETY CAP

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 20-15-00-910-001-A	Handling Precautions for Electrostatic Discharge Sensitive Devices
TASK 26-21-41-000-002-A	Removal of the Discharge Head of the Engine Fire-Extinguisher Bottle
TASK 26-21-41-000-004-A	Removal of the Cartridge of the Engine Fire-Extinguisher Bottle
Engine Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL
Engine Fire-Extinguisher Bottle ** ON A/C NOT FOR ALL
FOR [6WE1] (BOTTLE 1-FIRE EXTING, ENG 1)
FOR [8WE1] (BOTTLE 2-FIRE EXTING, ENG 1)
TASK 54-51-21-000-001-A	Removal of the Pylon Lateral Access-Doors
FOR [6WE2] (BOTTLE 1-FIRE EXTING, ENG 2)
FOR [8WE2] (BOTTLE 2-FIRE EXTING, ENG 2)
TASK 54-51-21-000-001-A	Removal of the Pylon Lateral Access-Doors

3. Job Set-up
Subtask 26-21-41-875-050-A ** ON A/C NOT FOR ALL

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 6WE2 (BOTTLE 1FIRE EXTING, ENG 2) FOR FIN: 6WE1 (BOTTLE 1FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
FOR FIN: 8WE2 (BOTTLE 2FIRE EXTING, ENG 2) FOR FIN: 8WE1 (BOTTLE 2FIRE EXTING, ENG 1)
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41

Subtask 26-21-41-941-050-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Make sure that the ENG/MODE/CRANK/NORM/IGN/START selector switch is in the NORM position.
(b) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
(4) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the pylon.

Subtask 26-21-41-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) FOR [6WE1] (BOTTLE 1-FIRE EXTING, ENG 1), [8WE1] (BOTTLE 2-FIRE EXTING, ENG 1)

Open the access doors 415BR 415BL (Ref. AMM TASK 54-51-21-000-001).

(2) FOR [6WE2] (BOTTLE 1-FIRE EXTING, ENG 2), [8WE2] (BOTTLE 2-FIRE EXTING, ENG 2)

Open the access doors 425BR 425BL (Ref. AMM TASK 54-51-21-000-001).

4. Procedure
Subtask 26-21-41-020-058-A ** ON A/C NOT FOR ALL

A. Disconnect the Electrical Connector

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.

(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) Disconnect the electrical connector (1) from the pressure switch (13).
(3) Disconnect the electrical connector (8) from the cartridge (9).
(4) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.

Subtask 26-21-41-481-050-B ** ON A/C NOT FOR ALL

B. Installation of the Safety Tool

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) Put a 53100141-1 PLUG, SHUNTM83723-60-18AN CAP, PROTECTIVE on the cartridge (9).

Subtask 26-21-41-020-051-B ** ON A/C NOT FOR ALL

C. Removal of the Fire-Extinguisher Bottle
(1) Loosen the nut (6).
(2) Remove the screws (2) and the washers (3).
(3) Turn the line (4) to the left.
(4) Turn the bottle (12) and remove the nut (15), the washer (16) and the bonding lead (14) from the screw (17).
(5) Remove the bottle (12):

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) Remove the bottle (12) and put it on an applicable support.
(6) Put the PLUG-BLANKING in each disconnected line end.

Subtask 26-21-41-481-050-C ** ON A/C NOT FOR ALL

D. Installation of the Safety Tool

(1) Put a 263193 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE on the cartridge (9).

Subtask 26-21-41-020-051-C ** ON A/C NOT FOR ALL

E. Removal of the Engine Fire-Extinguisher Bottle
(1) Loosen the nut (6).
(2) Remove the screws (2) and the washers (3).
(3) Turn the line (4) to the left side.
(4) Turn the engine fire-extinguisher bottle (12) and remove the nut (15), screw (18), washer (17) and bonding lead (16) from the discharge head (10).
(5) Remove the engine fire-extinguisher bottle (12):
(a) Install the 73245-02 SAFETY CAP on the nut (6) of the discharge head (10).

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.

(b) Remove the engine fire-extinguisher bottle (12) and put it on an applicable support.
(6) Put the PLUG-BLANKING in each disconnected line end.

Subtask 26-21-41-020-062-A ** ON A/C NOT FOR ALL

F. Removal of the Cartridge
(1) Remove the cartridge from the discharge head of the engine fire-extinguisher bottle (Ref. AMM TASK 26-21-41-000-004).

Subtask 26-21-41-020-063-A ** ON A/C NOT FOR ALL

G. Removal of the Discharge Head
(1) Remove the discharge head from the engine fire-extinguisher bottle (Ref. AMM TASK 26-21-41-000-002).

[Rev.10 from 2021] 2026.03.31 23:44:45 UTC