Detailed Inspection of Aft Engine Mount and Secondary Load Path Clearance, Fail Safe Pin [PW11]

TASK 71-22-41-220-805-A
Detailed Inspection of Aft Engine Mount and Secondary Load Path Clearance, Fail Safe Pin

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
Refer to the MPD TASK: 712222-01
DETAILED INSPECTION OF AFT ENGINE MOUNT AND SECONDARY LOAD PATH CLEARANCE, FAIL SAFE PIN.

NOTE: In this task the Aft engine mounts are installed on the pylon and 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
No specific	Torque wrench: range to between 11.5 and 9.63 m.daN (84.81 and 71.02 lbf.ft )

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. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	PIN	AIPC 71-22-86-01-010

E. 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 78-30-06-000-801-A	Removal of the Thrust Reverser Hinge Access Panels
TASK 78-30-06-400-801-A	Installation of the Thrust Reverser Hinge Access Panels
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
CMM 712002
Detailed Inspection of Aft Engine Mount and Secondary Load Path Clearance, Fail Safe Pin

3. Job Set-up
Subtask 71-22-41-941-059-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 71-22-41-010-089-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 an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 71-22-41-040-059-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for 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 maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 71-22-41-010-090-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Remove the left or right thrust reverser aft hinge access panel (Ref. AMM TASK 78-30-06-000-801).
(2) 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 71-22-41-220-052-A ** ON A/C NOT FOR ALL

A. Detailed Inspection of the Aft Engine Mount and Secondary Load-Path Clearance, Fail-Safe Pin

CAUTION: FOR EACH WASHER, MAKE SURE THAT YOU INSTALL THE CORRECT PART NUMBER AT THE CORRECT LOCATION. IF YOU DO NOT OBEY THIS INSTRUCTION, THE PIN CAN MOVE OUT FROM ITS POSITION.

(1) Use the MIRROR - INSPECTION and the FLASHLIGHT - HIGHPOWER to do this inspection.
(2) Get access to the aft engine mount in the 12 o'clock area (engine junction area).
(3) Use the P05-005wipe, lint-free to remove all dirt or unwanted material from the aft engine mount.
(4) Do the detailed inspection of the aft mount link (3), aft mount shackle (5), aft beam assy (1) and aft mount bolts (2) for dents, scratches, nicks and corrosion.
(a) If you find dents, scratches, nicks, corrosion or cracks, CMM 712002 inspection/check procedure.
(5) Do the detailed inspection of the secondary load path clearance.
(a) Make sure that the bolt assembly (4) turns freely.
1 If the bolt assembly (4) does not turn freely, contact Airbus for instructions.
2 If the bolt assembly (4) turns freely, examine the fail-safe pin (11).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

a Remove and discard the cotter pin (7).
b Remove the nut (8), the two washers (10), the screw (9) and the fail safe-pin (11).
c Do the visual inspection of the fail-safe pin (11):

If you find damage, contact Airbus for instructions.

d Install the fail-safe pin (11), the two washers (10), the screw (9) and the nut (8):

Install the screw (9) from the aft direction to the forward direction.
TORQUE the nut (8) to between 11.5 and 9.63 m.daN (84.81 and 71.02 lbf.ft ) .

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

e Install the new AIPC 71-22-86-01-010 PIN (7).
f Make sure that the two washers (10) are fully on the shoulders of the bushes.

5. Close-up
Subtask 71-22-41-410-071-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 71-22-41-440-056-A ** ON A/C NOT FOR ALL

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

Subtask 71-22-41-410-072-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) Install the left or right thrust reverser aft hinge access panel (Ref. AMM TASK 78-30-06-400-801).
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 12:57:21 UTC