Detailed Inspection of Aft Engine Mount Installation [IAE]

TASK 71-22-11-200-010-A
Detailed Inspection of Aft Engine Mount Installation

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: 712211-04
DETAILED INSPECTION OF AFT ENGINE MOUNT INSTALLATION
This TASK gives the data for a detailed inspection of the Aft engine mount with or without engine removal.

NOTE: The effectivity of this task is "ALL". To know if this task is applicable for your aircraft, refer to the MPD task applicability and the weight variant data given in the SRM introduction.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	1	FLASHLIGHT
No specific	1	MIRROR - INSPECTION
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-22-11-000-010-A	Removal of the Aft Engine Mount
TASK 71-22-11-400-010-A	Installation of the Aft Engine Mount
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
Aft Engine Mount

3. Job Set-up
Subtask 71-22-11-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 71-22-11-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Put the ACCESS PLATFORM 2M (6 FT) in position.

Subtask 71-22-11-040-050-A ** ON A/C NOT FOR ALL

C. Deactivate the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 71-22-11-010-052-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.

Subtask 71-22-11-110-050-A ** ON A/C NOT FOR ALL

E. Clean the aft engine mount
(1) Clean the aft engine mount with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with cleaning fluid (Material No.V01-002) .

4. Procedure
Subtask 71-22-11-210-051-A ** ON A/C NOT FOR ALL

A. Detailed Visual Inspection of the Aft Engine Mount

Aft Engine Mount ** ON A/C NOT FOR ALL

NOTE: The nuts for the beam adjoining bolts are designed to tighten against the shoulders of the bolts and not against the outer beam. For this reason, there may be some noticeable end play or looseness of the bolts even after the nuts have been properly torqued.

(1) Clean any dirt or unwanted material from the aft engine mount with a Textile-Lint free Cotton - (Material No.14SBA1) . Use the FLASHLIGHT and the MIRROR - INSPECTION to examine areas of the engine mount that are hard to see.
(2) Do this inspection on those areas of the aft engine mount that are visible without the removal of any hardware. Visually examine for cracks and corrosion:

Aft Engine Mount ** ON A/C NOT FOR ALL

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Visually examine the mount beam assembly (1), the link assemblies (2) and all of the anti-rotation and retainer plates (4) for: Aft Engine Mount ** ON A/C NOT FOR ALL
A.Cracks	No cracks are allowed.	If cracks are found, remove and replace the mount assembly (Ref. AMM TASK 71-22-11-000-010) and (Ref. AMM TASK 71-22-11-400-010). NOTE: Discard the damaged part and send the mount assembly to shop for inspection/check.
B.Corrosion	Discoloration caused by corrosion is acceptable provided there is no pitting or reduction in the cross-sectional area of the component.	If corrosion is found with pitting and/or reduction in the cross-section area, replace the damaged parts. If the bearing ball does not move freely, replace the bearing assembly. NOTE: Discard the damaged part and send the mount assembly to shop for inspection/check.

NOTE: For all other findings (nicks, scratches, gouge,...) send the part to shop.

Subtask 71-22-11-210-077-A ** ON A/C NOT FOR ALL

B. Visual Inspection of the Aft Engine Mount

Aft Engine Mount ** ON A/C NOT FOR ALL

(1) Visually examine the link assemblies (2) for correct installation to the turbine case and to the mount beam assembly.
(2) Visually examine all of the anti-rotation and retainer plates (4) for obvious damage and correct installation. Replace the damaged parts.

5. Close-up
Subtask 71-22-11-410-051-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 halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL, 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL, 462AR.

Subtask 71-22-11-440-050-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 71-22-11-410-052-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 02:30:27 UTC