Special Detailed Inspection (TC) of AFT Engine Mount Pylon Bolts [IAE]

TASK 71-22-11-200-802-A
Special Detailed Inspection (TC) of AFT Engine Mount Pylon Bolts

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job
Refer to the MPD TASK: 712211-06
SPECIAL DETAILED INSPECTION (TC) OF AFT ENGINE MOUNT PYLON BOLTS
This TASK gives the data for a special detailed inspection (TC) of the aft engine mount pylon bolts.

NOTE: The effectivity of this task is "A/C 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	1	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-002)	cleaning fluid
(Material No.V02-147)	lockwire
(Material No.V02-272)	safety cable
(Material No.V02-273)	safety cable
(Material No.V02-274)	safety cable
(Material No.V02-275)	safety cable
(Material No.V02-276)	safety cable
(Material No.V02-277)	safety cable
(Material No.V02-278)	safety cable
(Material No.V02-279)	safety cable
(Material No.V02-280)	safety cable
(Material No.V02-281)	safety cable
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-40-11-911-014-A	Locking Devices General Information
TASK 70-40-11-911-016-A	General Instructions for Uses of Safety Cable
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 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 71-22-11-941-058-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the 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 the 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 71-22-11-010-073-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 71-22-11-040-059-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 71-22-11-010-074-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 71-22-11-110-055-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 71-22-11-210-064-A ** ON A/C NOT FOR ALL

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

A. Check the Torque of the Aft Engine Mount Bolts

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

NOTE: Do not loosen the bolt before checking the torque.

NOTE: Perform the torque check one bolt at a time.

(1) Cut and discard the lockwire from the bolts (1).
(2) Check the torque of the bolts by applying a TORQUE to 383.48 lbf.ft (52 m.daN) (Ref. AMM TASK 70-23-11-911-013).

CAUTION: ALL BOLTS AND NUTS REMOVED BECAUSE OF FAILURE OF THE INSTALLATION TORQUE CHECK MUST BE DISCARDED.

(a) If the bolts (1) or barrel nuts (4) rotate, replace all four bolts (1) and barrel nuts (4), one at a time.
(3) Safety the bolts.

(a) Safety the bolts (1) with lockwire (Material No.V02-147) (Ref. AMM TASK 70-40-11-911-014).
Alternate: Use safety cable (Material No.V02-272) , safety cable (Material No.V02-273) , safety cable (Material No.V02-274) , safety cable (Material No.V02-275) , safety cable (Material No.V02-276) safety cable (Material No.V02-277) , safety cable (Material No.V02-278) ,
safety cable (Material No.V02-279) , safety cable (Material No.V02-280) or safety cable (Material No.V02-281) (Ref. AMM TASK 70-40-11-911-016).

NOTE: If the pylon flexible seals were removed, install them.

5. Close-up
Subtask 71-22-11-410-074-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):
(3) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(4) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 71-22-11-440-057-A ** ON A/C NOT FOR ALL

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

Subtask 71-22-11-410-075-A ** ON A/C NOT FOR ALL

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

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