W DOC AIRBUS | AMM A320F

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

TASK 26-21-49-000-803-A
Removal 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.
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
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
98D27803000000
1
LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
 B. 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
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
425AL, 425AR, 425BL, 425BR, 447AL, 448AR, 461AL, 462AR
 C. Referenced Information
REFERENCE
DESIGNATION
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 26-21-41-000-001-E
Removal 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 28-20-00-000-801-A
Removal of the Fuel Drain Line
TASK 28-20-00-000-803-A
Removal of the Pylon Engine Fuel-Feed-Pipes
TASK 54-51-21-000-802-A
Removal of the Pylon Lateral Access-Doors
TASK 54-51-61-000-801-A
Removal 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 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A
Opening of the Thrust Reverser Cowl-Doors
F Engine Fire-Extinguishing Bottle-Supports
F Pylon Fire-Detector-Harness Ramp-Assembly
F Engine Fire-Extinguishing Pipe (Aft Part)
3. Job Set-up
Subtask 26-21-49-861-050-A ** ON A/C NOT FOR ALL
A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 26-21-49-941-061-A ** ON A/C NOT FOR ALL
B. Safety Precautions
   (1) Make sure that the engine 1(2) shutdown occurred not less than five minutes before you do this procedure.
   (2) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
   (3) On FLAPS panel 114VU:
     (a) Put the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
     (b) Put a WARNING NOTICE(S) on the flap/slat control lever to tell persons not to operate the flap/slat controls.
Subtask 26-21-49-865-065-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE1Q44
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE2Q42
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q41
** ON A/C NOT FOR ALL
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/B2WE1Q43
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/A1WE1Q42
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL1/SQUIB/B2WE2Q41
121VUENGINE/ENG1 AND 2 FIRE EXTIG/BTL2/SQUIB/A1WE2Q40
** ON A/C NOT FOR ALL
FOR FIN: 4020KM1 (POWER PLANTDEMOUNTABLE, ENG 1)
49VUENGINE/1/FIRE DET/LOOP A7WD1A06
121VUENGINE/ENG1/FIRE DET/LOOP B8WD1Q38
FOR FIN: 4020KM2 (POWER PLANTDEMOUNTABLE, ENG 2)
49VUENGINE/2/FIRE DET/LOOP B8WD2A07
121VUENGINE/ENG2/FIRE DET/LOOP A7WD2Q39
Subtask 26-21-49-010-065-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Open the fan cowl doors (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 26-21-49-040-055-A ** ON A/C NOT FOR ALL
E. Deactivation of the Thrust Reverser System 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 26-21-49-010-066-A ** ON A/C NOT FOR ALL
F. Get Access
   (1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL and 452AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL and 462AR.
   (2) Put an ACCESS PLATFORM 2M (6 FT) in position.
   (3) Remove these access doors (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 26-21-49-010-070-A ** ON A/C NOT FOR ALL
G. Removal of the Components
   (1) Remove the two engine fire-extinguisher bottles (Ref. AMM TASK 26-21-41-000-001).
   (2) Removal of the engine fire-extinguishing bottle-supports
F Engine Fire-Extinguishing Bottle-Supports ** ON A/C NOT FOR ALL
     (a) Remove the bracket (27).
       1 Remove the two bolts (25) and nuts (26) from the bracket (27).
       2 Remove the bracket (27) from the support (24).
     (b) Remove the bracket (31).
       1 Remove the two bolts (30) and nuts (29) from the bracket (31).
       2 Remove the bracket (31) from the support (28).
     (c) Remove the bracket (32).
       1 Remove the two bolts (35) and washers (34) from the clamp (33).
       2 Disengage the duct (23) from the clamp (33).
       3 Remove the clamp (33) from the bracket (32).
       4 Remove the two bolts (42) and nuts (37) from the bracket (32).
       5 Remove the two bolts (41) and nuts (39) from the bracket (32).
       6 Remove the two bolts (40) and nuts (38) from the bracket (32).
       7 Remove the bracket (32) from the support (36).
   (3) If necessary:
   (4) Disassembly of the pylon fire-detector-harness ramp-assembly
F Pylon Fire-Detector-Harness Ramp-Assembly ** ON A/C NOT FOR ALL
     (a) Disconnect the four sensing elements (15) from the two responder units (12) as follows:
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 Turn the four quarter-turn fasteners (18) by one quarter of a turn and open the four clamps (17).
       2 Remove the four nuts (13) and (14) from the two responder units (12).
       3 Disconnect the four sensing elements (15) from the two responder units (12).
     (b) Disconnect of the pylon fire-detector-harness ramp-assembly (28) as follows:
       1 Remove the four bolts (19) and washers (20) from the two supports (21).
       2 Carefully remove the pylon fire-detector-harness ramp-assembly (22) from the two supports (21) and attach it temporarily. This is to make sure that pylon fire-detector-harness ramp-assembly (22) is not in tension and to prevent possible damage.
   (5) Remove the thermal blanket (Ref. AMM TASK 54-51-61-000-801).
4. Procedure
Subtask 26-21-49-020-056-B ** ON A/C NOT FOR ALL
A. Removal of the Engine Fire-Extinguishing Pipe (Aft Part)
   (1) Loosen the nut (5).
   (2) Remove the three bolts (3) and washers (4).
   (3) Disconnect the pipe (1) from the pipe (2).
   (4) Remove the six bolts (10) and washers (9) from the three clamps (8).
   (5) Remove the three clamps (8) from their supports (7).
   (6) Put the PLUG-BLANKING in each disconnected line end.
   (7) Remove the pipe (1) from the pylon.
[Rev.10 from 2021] 2026.04.01 07:59:38 UTC
"Aviabrain" 2025