W DOC AIRBUS | AMM A320F

Detailed Visual Inspection of the Forward Engine Mount Assembly [PW11]

TASK 71-21-41-210-802-A
Detailed Visual Inspection of the Forward Engine Mount Assembly

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: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.
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
NOTE: In this task, the forward engine mounts are removed from the pylon and installed on the engine.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
FLASHLIGHT - HIGHPOWER
No specific
AR
MIRROR - INSPECTION
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.P05-005)
wipe, lint-free
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR
 D. Referenced Information
REFERENCE
DESIGNATION
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
F Forward Engine Mount Assembly
3. Job Set-up
Subtask 71-21-41-941-059-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 71-21-41-010-077-A ** ON A/C NOT FOR ALL
B. 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.
   (2) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.
Subtask 71-21-41-040-059-A ** ON A/C NOT FOR ALL
C. 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 71-21-41-010-078-A ** ON A/C NOT FOR ALL
D. 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, 452AR.
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.
4. Procedure
Subtask 71-21-41-210-054-A ** ON A/C NOT FOR ALL
A. Detailed Visual Inspection of the Forward Engine Mount Assembly
NOTE: You can use the MIRROR - INSPECTION and the FLASHLIGHT - HIGHPOWER.
   (1) Get access to the nozzle 12 o'clock area (engine junction area).
   (2) Clean any dirt or unwanted material from the forward engine mount with P05-005wipe, lint-free.
   (3) Do the visual inspection of the forward-beam assembly (4) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion.
   (4) Do the visual inspection of the forward-mount yoke (7) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion.
   (5) Do the visual inspection of the two thrust links (2) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion.
   (6) Do the visual inspection of the forward-mount shackle assembly (6) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion.
   (7) Do the visual inspection of the snout radius (9) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion.
   (8) Do the visual inspection of the thrust link bolts (3) and (8) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion
  • Good installation (no play permitted).
     (a) Take care of the pin and screw positions:
  • For the thrust link bolts (3), the pin and screw shall be installed on the engine side.
  • For the thrust link bolts (8), the pin and screw shall be installed on the yoke side.
  • Presence and good condition of the cotter pin.
   (9) Examine the two shackle lower pins (5) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion
  • Good installation (no play permitted).
  • Presence and good condition of the stoppers, screws, nuts and cotter pins.
     (a) The head of the screw must be upward.
     (b) The screw must be placed, in one of a bushing hole, in a range of plus or minus 30 degrees versus the vertical axis.
   (10) Do the visual inspection of the bolt (10) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion
  • Good installation (no radial play permitted).
     (a) The screw must be installed from the right to the left.
  • Presence and good condition of the cotter pin.
   (11) Do the visual inspection of the fail safe pin (12) for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion.
   (12) Do the visual inspection of the forward-mount pylon bolt (1) and their retainers for:
  • Cracks
  • Damage
  • Scratches
  • Corrosion
  • Good installation (no play permitted).
   (13) Do the visual inspection of the castellated nut and the lock washer for damage and correct installation.
NOTE: The castellated nut and the lock washer hold the bearing in the shackle (11) on the forward engine-mount beam.
5. Close-up
Subtask 71-21-41-410-071-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) 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.
Subtask 71-21-41-440-056-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 71-21-41-410-072-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) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 02:33:08 UTC
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