Installation of the Engine Fire-Extinguishing Pipe (Aft Part)

TASK 26-21-49-400-803-A
Installation of the Engine Fire-Extinguishing Pipe (Aft Part)

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

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	1	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.28 and 0.23 m.daN (24.78 and 20.35 lbf.in )
No specific	Torque wrench: range to between 0.4 and 0.34 m.daN (35.40 and 30.09 lbf.in )
No specific	Torque wrench: range to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )
98D27803000000	AR	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06CMD9)	Silicone Adhesive Sealant-General Purpose One part legacy
(Material No.06LDG2)	Non Hardening Jointing Putty-High Temp. Area - Structure

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL, 415AR, 415BL, 415BR, 437AL, 438AR, 451AL, 452AR, 452BR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL, 425AR, 425BL, 425BR, 447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
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 26-21-00-720-802-A	Check Distribution Piping to Detect Leakage and Obstruction
TASK 26-21-41-000-001-E	Removal of the Engine Fire-Extinguisher Bottle
TASK 26-21-41-400-001-E	Installation of the Engine Fire-Extinguisher Bottle
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 28-16-00-000-001-A	Removal of the Fuel Recirculation Pipe
TASK 28-16-00-400-001-A	Installation of the Fuel Recirculation Pipe
TASK 28-20-00-000-801-A	Removal of the Fuel Drain Line
TASK 28-20-00-000-803-A	Removal of the Pylon Engine Fuel-Feed-Pipes
TASK 28-20-00-400-801-A	Installation of the Fuel Drain Line
TASK 28-20-00-400-803-A	Installation of the Pylon Engine Fuel-Feed-Pipes
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-802-A	Installation of the Pylon Lateral Access-Doors
TASK 54-51-61-000-801-A	Removal of the Thermal Blankets between RIB1 and RIB5
TASK 54-51-61-400-801-A	Installation of the Thermal Blankets between RIB1 and RIB5
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Engine Fire-Extinguishing Bottle-Supports
Pylon Fire-Detector-Harness Ramp-Assembly
Engine Fire-Extinguishing Pipe (Aft Part)

3. Job Set-up
Subtask 26-21-49-861-051-A ** ON A/C NOT FOR ALL

A. Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).

Subtask 26-21-49-860-056-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(2) 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).
(b) Make sure that the WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

Subtask 26-21-49-865-066-A ** ON A/C NOT FOR ALL

C. 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/BTL2/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39

Subtask 26-21-49-010-067-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR

Subtask 26-21-49-040-056-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser for Ground Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that the thrust reverser system is deactivated for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 26-21-49-010-068-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Make sure that the thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL and 452BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL and 462AR.
(2) Make sure that an ACCESS PLATFORM 2M (6 FT) is in position.
(3) Make sure that these access doors are removed (Ref. AMM TASK 54-51-21-000-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL, 415BL, 415AR and 415BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL, 425BL, 425AR and 425BR.

Subtask 26-21-49-010-069-A ** ON A/C NOT FOR ALL

G. Removal of the Components
(1) Make sure that the two engine fire-extinguisher bottles are removed (Ref. AMM TASK 26-21-41-000-001).
(2) Make sure that the engine fire-extinguishing bottle-supports are removed.

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

(3) If necessary:

Make sure that the pylon engine-fuel feed-pipe and/or the fuel drain line is (are) removed (Ref. AMM TASK 28-20-00-000-803) and/or (Ref. AMM TASK 28-20-00-000-801).
Make sure that the fuel recirculation pipe is removed (Ref. AMM TASK 28-16-00-000-001).

(4) Make sure that the pylon fire-detector-harness ramp-assembly is disassembled.

Pylon Fire-Detector-Harness Ramp-Assembly ** ON A/C NOT FOR ALL

(5) Make sure that the thermal blanket is removed (Ref. AMM TASK 54-51-61-000-801).

4. Procedure
Subtask 26-21-49-420-058-B ** ON A/C NOT FOR ALL

A. Installation of the Engine Fire-Extinguisher Pipe (Aft Part)
(1) Remove the PLUG-BLANKING from each disconnected line end.
(2) Clean the mating surface of the elbow (6) (Ref. AMM TASK 20-28-00-912-802).
(3) Apply a layer of Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) on the mating surface of the elbow (6).
(4) Put the pipe (1) in the correct position.
(5) Install the pipe (1) on the pipe (2).
(6) Install the three washers (4) and screws (3).
(7) Tighten the screws (3).
(8) Tighten the nut (5).

NOTE: Do not torque the nut (5) at this time.

(9) Do an electrical bonding of the elbow (6) (Ref. AMM TASK 20-28-00-912-802).
(10) Apply a layer of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) on the edge of surface of the elbow (6) and on the three washers (4) and screws (3).
(11) Install the three clamps (8) on the supports (7).
(12) Install the six washers (9) and bolts (10) on the three clamps (8).
(13) Tighten the six bolts (10).
(14) TORQUE the nut (5) to between 9.5 and 8.5 m.daN (70.06 and 62.68 lbf.ft )

Subtask 26-21-49-720-052-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 26-21-00-720-802).

Subtask 26-21-49-410-061-A ** ON A/C NOT FOR ALL

C. Installation of the Components
(1) Install the thermal blanket (Ref. AMM TASK 54-51-61-400-801).
(2) Installation of the pylon fire-detector-harness ramp-assembly

Pylon Fire-Detector-Harness Ramp-Assembly ** ON A/C NOT FOR ALL

(a) Install the pylon fire-detector-harness ramp-assembly (22) on the supports (21) and hold it.
1 Install the four washers (20) and bolts (19) and tighten the bolts (19).
(b) Installation of the four sensing elements (15)

CAUTION: DO NOT USE ELECTRICAL OR PNEUMATIC TOOLS TO LOOSEN OR TIGHTEN THE QUARTER-TURN FASTENER ON THE FIRE DETECTOR CLAMP. ONLY USE A MANUAL SCREWDRIVER. ELECTRICAL OR PNEUMATIC TOOLS WILL CAUSE THE FASTENER TO TURN TOO MUCH AND POSSIBLY TO BREAK.

1 Connect the four sensing elements (15) to the two responder units (12).
2 Install the four nuts (13) and (14) on the two responder units (12).
a TORQUE the two nuts (13) to between 0.28 and 0.23 m.daN (24.78 and 20.35 lbf.in )

.
b TORQUE the two nuts (14) to between 0.4 and 0.34 m.daN (35.40 and 30.09 lbf.in )

.
3 Engage the four sensing elements (15) in the four clamps (17).
4 Close the four clamps (17) and turn the related quarter-turn fasteners (18) by one quarter of a turn.
(3) If removed:

Install the pylon engine-fuel feed-pipe and/or the fuel drain line (Ref. AMM TASK 28-20-00-400-803) and/or (Ref. AMM TASK 28-20-00-400-801).
Install the fuel recirculation pipe (Ref. AMM TASK 28-16-00-400-001).

(4) Installation of the engine fire-extinguishing bottle-supports.

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

(a) Install the bracket (32).
1 Install the bracket (32) on the support (36).
2 Install the two bolts (41) and nuts (39) on the bracket (32) and tighten them.
3 Install the two bolts (42) and nuts (37) on the bracket (32) and tighten them.
4 Install the two bolts (40) and nuts (38) on the bracket (32) and tighten them.
5 Install the clamp (33) with the duct (23) on the bracket (32).
6 Install the two washers (34) and bolts (35) on the clamp (33) and tighten them.
(b) Install the bracket (31).
1 Install the bracket (31) on the support (28).
2 Install the two bolts (30) and nuts (29) on the bracket (31) and tighten them.
(c) Install the bracket (27).
1 Install the bracket (27) on the support (24).
2 Install the two bolts (25) and nuts (26) on the bracket (27) and tighten them.
(5) Install the two engine fire-extinguisher bottles (Ref. AMM TASK 26-21-41-400-001).

Subtask 26-21-49-865-067-A ** ON A/C NOT FOR ALL

D. 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/BTL2/SQUIB/B	2WE1	Q44
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B	2WE1	Q43
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A	1WE1	Q42
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B	2WE2	Q41
121VU	ENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A	1WE2	Q40
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VU	ENGINE/1/FIRE DET/LOOP A	7WD1	A06
121VU	ENGINE/ENG1/FIRE DET/LOOP B	8WD1	Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VU	ENGINE/2/FIRE DET/LOOP B	8WD2	A07
121VU	ENGINE/ENG2/FIRE DET/LOOP A	7WD2	Q39

Subtask 26-21-49-860-057-A ** ON A/C NOT FOR ALL

E. Do the EIS start procedure (upper ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).

Subtask 26-21-49-720-053-A ** ON A/C NOT FOR ALL

F. Test
(1) On the upper ECAM DU, make sure that the FIRE ENG1(2) LOOP A (B) FAULT message is out of view.
(2) Do an operational test of the engine-fire detection system (Ref. AMM TASK 26-12-00-710-001).

Subtask 26-21-49-860-058-A ** ON A/C NOT FOR ALL

G. Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).

5. Close-up
Subtask 26-21-49-410-059-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close these access doors (Ref. AMM TASK 54-51-21-400-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
415AL, 415BL, 415AR and 415BR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL, 425BL, 425AR and 425BR.
(3) Remove the access platform(s).
(4) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL and 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL and 462AR.

Subtask 26-21-49-440-053-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after ground maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 26-21-49-410-060-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) On FLAPS panel 114VU:

Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever.

(3) Remove the WARNING NOTICE(S).

Subtask 26-21-49-862-050-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.03.31 23:45:17 UTC