DOC AIRBUS | AMM A320FInstallation of the Aft Pylon Fairing (APF)
TASK 54-56-00-400-802-A
Installation of the Aft Pylon Fairing (APF)
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 54-56-00-941-067-A ** ON A/C NOT FOR ALL
Subtask 54-56-00-420-059-B ** ON A/C NOT FOR ALL
Subtask 54-56-00-410-054-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:03:27 UTC
Installation of the Aft Pylon Fairing (APF)
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.
WARNING:
BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.
CAUTION:
BEFORE YOU INSTALL/REMOVE THE GSE-TOOL, READ THE INSTRUCTIONS IN THE APPLICABLE GSE INSTRUCTION MANUAL. WHILE YOU OPERATE THIS TOOL, CAREFULLY OBEY THEM. IF YOU DO NOT OBEY THE INSTRUCTIONS, DAMAGE TO EQUIPMENT CAN OCCUR.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | Torque wrench: range to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )  | |
| No specific | Torque wrench: range to between 1.38 and 1.06 m.daN (122.12 and 93.81 lbf.in ) | |
| No specific | Torque wrench: range to between 1.61 and 1.31 m.daN (142.48 and 115.93 lbf.in ) | |
| 98D54403004000 | 1 | R/I PYLON APF |
| 98D54403010000 | 1 | RI APF INSTALL SUPPORT |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 470 | ENGINE 1 AFT PYLON |
| 480 | ENGINE 2 AFT PYLON |
| 473AL, 473AR, 483AL, 483AR | |
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 54-54-00-400-804-A | Installation of the Closing Sheet Metal |
| TASK 54-56-11-010-801-A | Opening of the Rear Mount Fairing (RMF) Door |
| TASK 54-56-11-410-801-A | Closing of the Rear Mount Fairing (RMF) Door |
| 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 |
Aft Pylon FairingSubtask 54-56-00-941-067-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 54-56-00-010-059-A ** ON A/C NOT FOR ALL (1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
B. 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.
(2) 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 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, in zone 470
(b) For the right pylon, in zone 480.
(4) Make sure that the Rear Mount Fairing (RMF) door is open (Ref. AMM TASK 54-56-11-010-801):
(a) For the left pylon: 473AL 473AR
(b) For the right pylon: 483AL 483AR.
Subtask 54-56-00-040-063-A ** ON A/C NOT FOR ALL (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.
(2) 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 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon, in zone 470
(b) For the right pylon, in zone 480.
(4) Make sure that the Rear Mount Fairing (RMF) door is open (Ref. AMM TASK 54-56-11-010-801):
(a) For the left pylon: 473AL 473AR
(b) For the right pylon: 483AL 483AR.
C. Deactivation of the Thrust Reverser
4. ProcedureWARNING:
MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.
(1) Make sure that the thrust reverser is unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805). Subtask 54-56-00-420-059-B ** ON A/C NOT FOR ALL
A. Installation of the Aft Pylon Fairing (APF)
(a) Put the tension bar (14) in position on the bootstrap fittings (13) and install the quick locking pins (15).
(b) Put the APF (2) in position with the 98D54403004000 R/I PYLON APF (12).
(c) Put the strap (16) through the strainer (20), before you install the hooks (17).
(d) Install the hooks (17) on the shackles (18).
(e) Put the plier (19) on the APF leading edge and adjust the strap (16) in the correct direction.
(f) Put the protection (21) around the strainer (20).
(g) Pull the strap (16) to compress the exhaust nozzle seals.
(2) When you install the APF (2) again, make sure that the pylon holes and the APF holes are correctly aligned. If it is not correctly aligned:
(a) Loosen the screws (3) of the primary structure.
(b) Adjust the primary structure strip (4) to align the holes.
(c) Tighten the screws (3).
(3) Install the screws (5).
(4) TORQUE the screws (5) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in ).
(5) Install the washers (7) and the bolts (6).
(6) Install the washers (9) and (10), the screws (11) and the nuts (8).
(7) TORQUE the bolts (6) to between 1.61 and 1.31 m.daN (142.48 and 115.93 lbf.in ).
(8) TORQUE the nuts (8) to between 1.38 and 1.06 m.daN (122.12 and 93.81 lbf.in ).
(9) Install the screws (1) and tighten them.
(10) Remove the 98D54403004000 R/I PYLON APF (12) from the APF (2).
(11) Remove the 98D54403010000 RI APF INSTALL SUPPORT from the APF (2). To do this:
(a) Adjust the strainer (20) to release the tension in the strap (16).
(b) Remove the plier (19) from the APF leading edge and release the strap (16).
(c) Remove the protection (21) from the strainer (20).
(d) Remove the hooks (17) from the shackles (18).
(e) Remove the strap (16) through the strainer (20).
(f) Remove the quick locking pins (15) and tension bar (14) from the bootstrap fittings (13).
Subtask 54-56-00-410-053-A ** ON A/C NOT FOR ALL CAUTION:
MAKE SURE THAT YOU INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION. THE SCREWS HAVE DIFFERENT LENGTHS. IF YOU DO NOT INSTALL EACH OF THE SCREWS IN ITS CORRECT POSITION, YOU CAN CAUSE DAMAGE.
(1) Install the 98D54403010000 RI APF INSTALL SUPPORT on the APF (2). To do this: (a) Put the tension bar (14) in position on the bootstrap fittings (13) and install the quick locking pins (15).
(b) Put the APF (2) in position with the 98D54403004000 R/I PYLON APF (12).
(c) Put the strap (16) through the strainer (20), before you install the hooks (17).
(d) Install the hooks (17) on the shackles (18).
(e) Put the plier (19) on the APF leading edge and adjust the strap (16) in the correct direction.
(f) Put the protection (21) around the strainer (20).
(g) Pull the strap (16) to compress the exhaust nozzle seals.
(2) When you install the APF (2) again, make sure that the pylon holes and the APF holes are correctly aligned. If it is not correctly aligned:
(a) Loosen the screws (3) of the primary structure.
(b) Adjust the primary structure strip (4) to align the holes.
(c) Tighten the screws (3).
(3) Install the screws (5).
(4) TORQUE the screws (5) to between 1.06 and 0.82 m.daN (93.81 and 72.57 lbf.in )
. (5) Install the washers (7) and the bolts (6).
(6) Install the washers (9) and (10), the screws (11) and the nuts (8).
(7) TORQUE the bolts (6) to between 1.61 and 1.31 m.daN (142.48 and 115.93 lbf.in )
. (8) TORQUE the nuts (8) to between 1.38 and 1.06 m.daN (122.12 and 93.81 lbf.in )
. (9) Install the screws (1) and tighten them.
(10) Remove the 98D54403004000 R/I PYLON APF (12) from the APF (2).
(11) Remove the 98D54403010000 RI APF INSTALL SUPPORT from the APF (2). To do this:
(a) Adjust the strainer (20) to release the tension in the strap (16).
(b) Remove the plier (19) from the APF leading edge and release the strap (16).
(c) Remove the protection (21) from the strainer (20).
(d) Remove the hooks (17) from the shackles (18).
(e) Remove the strap (16) through the strainer (20).
(f) Remove the quick locking pins (15) and tension bar (14) from the bootstrap fittings (13).
B. Installation of the Components
(1) Install the closing sheet metal (Ref. AMM TASK 54-54-00-400-804).
(2) Close the Rear Mount Fairing (RMF) door (Ref. AMM TASK 54-56-11-410-801):
(a) For the left pylon: 473AL 473AR
(b) For the right pylon: 483AL 483AR.
Subtask 54-56-00-820-055-B ** ON A/C NOT FOR ALL (1) Install the closing sheet metal (Ref. AMM TASK 54-54-00-400-804).
(2) Close the Rear Mount Fairing (RMF) door (Ref. AMM TASK 54-56-11-410-801):
(a) For the left pylon: 473AL 473AR
(b) For the right pylon: 483AL 483AR.
C. Check of the Clearances
(1) Make sure that the clearance between the APF (1) and the RMF door (4), J1 is 4.2 +2 mm or -2 mm (0.1654 +0.0787 in. or -0.0787 in.).
(2) Make sure that the clearance between the APF (1) and the pylon (3), J2 is 3 +2.1 mm or -2.1 mm (0.1181 +0.0827 in. or -0.0827 in.).
(3) Make sure that the clearance between the APF (1) and the closing sheet metal (2), J3 is 2 +2 mm or -2 mm (0.0787 +0.0787 in. or -0.0787 in.).
(4) Make sure that the out-of-flush dimension between the APF (1) and the RMF door (4), A1 is 0 +0.7 mm or -0.5 mm (0.0000 +0.0276 in. or -0.0197 in.).
(5) Make sure that the out-of-flush dimension between the APF (1) and the pylon (3), A2 is 0 +0.7 mm or -0.5 mm (0.0000 +0.0276 in. or -0.0197 in.).
(6) Make sure that the out-of-flush dimension between the APF (1) and the closing sheet metal (2), A3 is 0 +0.6 mm or -0.6 mm (0.0000 +0.0236 in. or -0.0236 in.).
(7) If the values of the peripheral clearances and the out-of-flush dimensions do not agree with the permitted values given above, contact Airbus.
5. Close-up(1) Make sure that the clearance between the APF (1) and the RMF door (4), J1 is 4.2 +2 mm or -2 mm (0.1654 +0.0787 in. or -0.0787 in.).
(2) Make sure that the clearance between the APF (1) and the pylon (3), J2 is 3 +2.1 mm or -2.1 mm (0.1181 +0.0827 in. or -0.0827 in.).
(3) Make sure that the clearance between the APF (1) and the closing sheet metal (2), J3 is 2 +2 mm or -2 mm (0.0787 +0.0787 in. or -0.0787 in.).
(4) Make sure that the out-of-flush dimension between the APF (1) and the RMF door (4), A1 is 0 +0.7 mm or -0.5 mm (0.0000 +0.0276 in. or -0.0197 in.).
(5) Make sure that the out-of-flush dimension between the APF (1) and the pylon (3), A2 is 0 +0.7 mm or -0.5 mm (0.0000 +0.0276 in. or -0.0197 in.).
(6) Make sure that the out-of-flush dimension between the APF (1) and the closing sheet metal (2), A3 is 0 +0.6 mm or -0.6 mm (0.0000 +0.0236 in. or -0.0236 in.).
(7) If the values of the peripheral clearances and the out-of-flush dimensions do not agree with the permitted values given above, contact Airbus.
Subtask 54-56-00-410-054-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
(2) 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.
Subtask 54-56-00-440-061-A ** ON A/C NOT FOR ALL (1) Close the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR.
(2) 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.
B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 54-56-00-942-059-A ** ON A/C NOT FOR ALL (1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).
C. Aircraft Maintenance Configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).