Installation of the Engine Fire-Extinguishing Pipe

TASK 26-21-49-400-001-A
Installation of the Engine Fire-Extinguishing Pipe

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

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

ZONE: 400

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)
263193	2	SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06ABB1)	Polysulfide Sealant-Fuel Tank Fillet -
(Material No.14QGC1)	Wire-Locking Dia: 1 mm (0.041 inch) CRES -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
413AL, 415AL, 415BL, 437AL, 451AL, 461AL
FOR [1000EM2] (ENGINE-2)
423AL, 425AL, 425BL, 447AL, 451AL, 461AL

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
12	O-RING	AIPC 26-21-06-01-150
15	ORING	AIPC 26-21-06-01-150
18	ORING	AIPC 26-21-06-01-150
33	O-RING	AIPC 26-21-06-01-150
9	O-RING	AIPC 26-21-06-01-150

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-15-00-910-001-A	Handling Precautions for Electrostatic Discharge Sensitive Devices
TASK 26-21-00-720-003-C	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-003-C-01	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-00-720-003-C-02	Check Distribution Piping to Detect Leakage and Obstruction
TASK 36-11-53-400-001-A	Installation of the Overpressure Valve
TASK 36-11-54-400-001-A	Installation of the Fan Air Valve
TASK 54-57-22-000-001-A	Removal of the Apron Assemblies
TASK 54-57-22-400-001-A	Installation of the Apron Assemblies
TASK 71-13-11-000-010-A	Removal of the Left Fan Cowl 437AL(447AL).
TASK 71-13-11-400-010-A	Installation of the Left Fan Cowl
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
Fire Extinguisher Bottle
Engine Fire-Extinguishing Pipe
FOR [1000EM1] (ENGINE-1)
TASK 78-32-01-000-010-A	Removal of the Left Thrust Reverser Half - Eng No. 1
TASK 78-32-01-400-010-A	Installation of the Left Thrust Reverser Half - Eng No. 1
FOR [1000EM2] (ENGINE-2)
TASK 78-32-02-000-010-A	Removal of the Left Thrust Reverser Half - Eng No. 2
TASK 78-32-02-400-010-A	Installation of the Left Thrust Reverser Half - Eng No. 2

3. Job Set-up
Subtask 26-21-49-860-055-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(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) in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) On the AIR COND panel 30VU, make sure that the ENG 1(2) BLEED and APU BLEED pushbutton switches are released. Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(4) In the cockpit, on the HP ground connector, make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

Subtask 26-21-49-865-055-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
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
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 26-21-49-010-057-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the left fan cowl is removed (Ref. AMM TASK 71-13-11-000-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL,
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(2) Make sure that the left thrust reverser half is removed:
(a) FOR [1000EM1] (ENGINE-1)
451AL (Ref. AMM TASK 78-32-01-000-010),
(b) FOR [1000EM2] (ENGINE-2)
461AL (Ref. AMM TASK 78-32-02-000-010).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(4) Make sure that these access doors are removed:
(a) FOR [1000EM1] (ENGINE-1)
413AL 415AL 415BL,
(b) FOR [1000EM2] (ENGINE-2)
423AL 425AL 425BL.
(5) Make sure that the apron assembly is removed (Ref. AMM TASK 54-57-22-000-001).

Subtask 26-21-49-040-053-A ** ON A/C NOT FOR ALL

D. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated: (Ref. AMM TASK 78-30-00-040-012)

Subtask 26-21-49-481-053-B ** ON A/C NOT FOR ALL

E. Installation of the Safety Tool

Fire Extinguisher Bottle ** ON A/C NOT FOR ALL

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) Make sure that the 263193 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE are installed on the two cartridges (1).

4. Procedure
Subtask 26-21-49-420-050-C ** ON A/C NOT FOR ALL

A. Installation of the Fire Extinguishing Pipes
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the PLUG-BLANKING from each disconnected line end.
(4) Installation of the pipe (6):
(a) Install the clamp (68) in the correct position on the pipe (6).
(b) Put the pipe (6) in the correct position between the fairing (41) and rib (34).
(c) Put the bulkhead (52) in the correct position.
1 Install the screw (51), washer (55) and nut (56).
a Tighten the screw (51).
2 Put the shim (48) in the correct position.
a Install the bolt (46), washer (59) and nut (60).
b Install the two bolts (47), the two washers (53) and the two nuts (54).
c Tighten the bolt (46).
d Tighten the two bolts (47).
3 Put the shim (44) in the correct position.
a Install the three bolts (45), the three washers (62) and the three nuts (61).
b Tighten the three bolts (45).
4 Install the bolt (49), washer (57) and nut (58).
5 Apply a layer of Polysulfide Sealant-Fuel Tank Fillet - (Material No.06ABB1) around the pipes (43) and (6), and against the bulkhead (52) and the fairing (41).
6 Install the seal (50) on the bulkhead (52).
(d) Make sure that the clamp (63) is in the correct position.
1 Install the washer (64) and the bolt (65) on the clamp (63) and the pipe (6).
a Tighten the bolt (65).
(e) Install the washer (66) and the bolt (67) on the clamp (68).
1 Tighten the bolt (67).
(5) Installation of the pipe (7):
(a) Install the three bushings (27) and the three clamps (26) in the correct position on the pipe (7).
(b) Install the pipe (7) in the correct position and connect it on the pipe (6).

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT EQUIPMENT FROM FLEXIBLE HOSES AND RIGID TUBING. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL CAUSE DAMAGE TO THE HOSES AND TUBES.

1 Hold the nut (35) of the pipe (6) and tighten the nut (29) of the pipe (7).
(c) Make sure that the three bushings (27) and the three clamps (26) are in the correct position on the three supports (28).
1 Install the three washers (24) and the three bolts (25).
a Tighten the three bolts (25).
(6) Installation of the pipe (5):
(a) Install the clamp (22) in the correct position on the pipe (5).
(b) Put the new AIPC 26-21-06-01-150 O-RING (33) in position on the pipe (5).
(c) Install the pipe (5) in the correct position between the rib (34) and the support (23).
(d) Install the three washers (31), the three bolts (30) and the three nuts (32).
1 Tighten the three bolts (30).
(e) Make sure that the clamp (22) is in the correct position on the support (23).
(f) Install the washer (20) and the bolt (21) on the clamp (22).
1 Tighten the bolt (21).
(7) Installation of the pipe (4):
(a) Put the new AIPC 26-21-06-01-150 ORING (18) in position on the end fitting (19) of the pipe (5).
(b) Install the pipe (4) in the correct position between the pipe (5), union (11) and support (40).
(c) Install the rubber pad (39) on the pipe (4) and on the support (40).
(d) Install the three washers (38), the three spacers (37) and the three bolts (36). Do not tighten the three bolts (36) at this time.
(e) Tighten the knurled nut (17) of the pipe (4) fully with your hand.
(f) Tighten the three bolts (36).
(g) Installation of the lockwire:

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.

1 Safety the knurled nut (17) of the pipe (4) and the end fitting (19) of the pipe (5) with 14QGC1Wire-Locking Dia: 1 mm (0.041 inch) CRES -.
(8) Installation of the pipe (3):
(a) Put the new AIPC 26-21-06-01-150 ORING (15) in position on the end fitting (14) of the pipe (3).
(b) Install the pipe (3) in the correct position between the pipe (4) and the union (10).
(c) Tighten the knurled nut (16) of the pipe (4) fully with your hand.
(d) Installation of the lockwire:

1 Safety the knurled nut (16) of the pipe (4) and the end fitting (14) of the pipe (3) with 14QGC1Wire-Locking Dia: 1 mm (0.041 inch) CRES -.

Subtask 26-21-49-720-050-A ** ON A/C NOT FOR ALL

B. Test
(1) Do a check of the engine fire-extinguishing distribution-piping for leakage and obstruction (Ref. AMM TASK 26-21-00-720-003).

Subtask 26-21-49-420-051-A ** ON A/C NOT FOR ALL

C. Connection of the Fire Extinguishing Pipe to the Fire Extinguisher Bottles

Engine Fire-Extinguishing Pipe ** ON A/C NOT FOR ALL

(1) Put the new AIPC 26-21-06-01-150 O-RING (12) in position on the union (11).
(2) Tighten the knurled nut (13) of the pipe (4) fully with your hand.
(3) Installation of the lockwire:

(a) Safety the knurled nut (13) of the pipe (4) and the union (11) with 14QGC1Wire-Locking Dia: 1 mm (0.041 inch) CRES -.
(4) Put the new AIPC 26-21-06-01-150 O-RING (9) in position on the union (10).
(5) Tighten the knurled nut (8) of the pipe (3) fully with your hand.
(6) Installation of the lockwire:

(a) Safety the knurled nut (8) of the pipe (3) and the union (10) with 14QGC1Wire-Locking Dia: 1 mm (0.041 inch) CRES -.

Subtask 26-21-49-081-052-B ** ON A/C NOT FOR ALL

D. Removal of the Safety Tools

Fire Extinguisher Bottle ** ON A/C NOT FOR ALL

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) Do these steps for each fire extinguisher bottle:
(a) Before you touch the cartridge, refer to the handling precautions for devices that are sensitive to electrostatic discharge (Ref. AMM TASK 20-15-00-910-001).
(b) Remove the 263193 SHUNT PLUG-FIRE EXTINGUISHER CARTRIDGE from the cartridge (1).

Subtask 26-21-49-420-067-A ** ON A/C NOT FOR ALL

E. Connection of the Electrical Connectors to the Two Fire Extinguisher Bottles

Fire Extinguisher Bottle ** ON A/C NOT FOR ALL

(1) Do these steps for each fire extinguisher bottle:
(a) Remove the CAP-BLANKING from each electrical connector and receptacle.
(b) Make sure that all the electrical connections are clean and in the correct condition.
(c) Connect the electrical connector (2) to the cartridge (1).

5. Close-up
Subtask 26-21-49-420-055-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Install the overpressure valve (Ref. AMM TASK 36-11-53-400-001):
(a) FOR [1000EM1] (ENGINE-1)
overpressure valve 5HA1,
(b) FOR [1000EM2] (ENGINE-2)
overpressure valve 5HA2.
(2) Install the engine fan air valve (Ref. AMM TASK 36-11-54-400-001):
(a) FOR [1000EM1] (ENGINE-1)
engine fan air valve 9HA1,
(b) FOR [1000EM2] (ENGINE-2)
engine fan air valve 9HA2.

Subtask 26-21-49-410-050-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access doors:
(a) FOR [1000EM1] (ENGINE-1)
415BL 415AL,
(b) FOR [1000EM2] (ENGINE-2)
425BL 425AL.
(3) Install the apron assembly (Ref. AMM TASK 54-57-22-400-001).
(4) Install the access panels:
(a) FOR [1000EM1] (ENGINE-1)
413AL,
(b) FOR [1000EM2] (ENGINE-2)
423AL.
(5) Install the left thrust reverser half:

NOTE: If the engine is removed, the installation of the fan cowls below is not applicable.

(a) FOR [1000EM1] (ENGINE-1)
461AL (Ref. AMM TASK 78-32-01-400-010),
(b) FOR [1000EM2] (ENGINE-2)
451AL (Ref. AMM TASK 78-32-02-400-010).

Subtask 26-21-49-440-051-A ** ON A/C NOT FOR ALL

C. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 26-21-49-410-053-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Install the left fan cowl (Ref. AMM TASK 71-13-11-400-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL,
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 26-21-49-865-051-A ** ON A/C NOT FOR ALL

E. 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
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41

[Rev.10 from 2021] 2026.03.31 23:45:15 UTC