Installation of the No.5 Bearing Compartment Cover [IAE]

TASK 72-51-41-400-010-B
Installation of the No.5 Bearing Compartment Cover

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

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 72 and 62 lbf.in (0.81 and 0.70 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-124)	Isopropyl Alcohol, Technical grade
(Material No.V10-077)	lubricant (engine oil)
(Material No.V10-129)	anti-seize paste
(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
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	PACKING	EIPC 72-58-01-80-030
3	PACKING	EIPC 72-58-01-80-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
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 78-11-12-000-010-A	Removal of the Engine Exhaust Cone
TASK 78-11-12-400-010-A	Installation of the Engine Exhaust Cone
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
Installation of the No.5 Bearing Compartment Cover
Installation of the No.5 Bearing Compartment Cover Seal

3. Job Set-up
Subtask 72-51-41-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
(4) Make sure that the exhaust cone is removed (Ref. AMM TASK 78-11-12-000-010).

Subtask 72-51-41-010-057-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowls are open (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL, 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL, 448AR.

Subtask 72-51-41-040-054-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) Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012):

4. Procedure
Subtask 72-51-41-110-051-A ** ON A/C NOT FOR ALL

A. Cleaning the Surfaces

Installation of the No.5 Bearing Compartment Cover ** ON A/C NOT FOR ALL

(1) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-124Isopropyl Alcohol, Technical grade to clean these parts:
(a) The surfaces of the compartment cover (2).
(b) The surfaces of the rear thermal blanket (1).

Subtask 72-51-41-420-051-A ** ON A/C NOT FOR ALL

CAUTION: WHILE YOU INSTALL THE NO.5 BEARING COMPARTMENT COVER, VISUALLY EXAMINE THE SEAL WITH A FLASHLIGHT AND A MIRROR TO MAKE SURE THAT THE SEAL IS NOT DAMAGED. IF THE SEAL IS DAMAGED, OIL LEAKAGE/LOSS FROM THE NO.5 BEARING COMPARTMENT CAN OCCUR.

B. Installation of Compartment Cover

Installation of the No.5 Bearing Compartment Cover ** ON A/C NOT FOR ALL

(1) Lubricate the EIPC 72-58-01-80-030 PACKING (3) with V10-077lubricant (engine oil).
(a) Install the packing (3) on the No.5 bearing compartment cover (2).
(b) Make sure that the open side of the packing shows in forward direction.

Installation of the No.5 Bearing Compartment Cover Seal ** ON A/C NOT FOR ALL

(2) Install the compartment cover (2) on the turbine exhaust case.

Installation of the No.5 Bearing Compartment Cover ** ON A/C NOT FOR ALL

(3) Install the rear thermal blanket (1) on the cover.
(a) Align the bolt holes.
(4) Apply anti-seize paste (Material No.V10-129) on the threads and the underside of the bolt heads.
(5) Install the 13 bolts.
(a) TORQUE the bolts to between 72 and 62 lbf.in (0.81 and 0.70 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(b) Remove excess paste.

Subtask 72-51-41-420-058-A ** ON A/C NOT FOR ALL

C. Optional Method of Installation of Compartment Cover Using Dry Ice

Installation of the No.5 Bearing Compartment Cover ** ON A/C NOT FOR ALL

(1) Lubricate the EIPC 72-58-01-80-050 PACKING (3) with V10-077lubricant (engine oil):
(a) Install the packing (3) on to the No. 5 bearing compartment cover (2).
(b) Make sure that the open side of the packing shows in forward direction.

Installation of the No.5 Bearing Compartment Cover Seal ** ON A/C NOT FOR ALL

CAUTION: DO NOT LET THE DRY ICE TOUCH THE SEAL. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO EQUIPMENT CAN OCCUR.

(2) Chill the compartment cover in dry ice for a minimum of 1 hour and a maximum of 3 hours. Dry ice must be crushed. Put the convex side of the cover into the crushed dry ice and put crushed dry ice on the concave surface of the cover.

NOTE: At least 2 lb (0.91 kg) of crushed dry ice should be used.

5. Close-up
Subtask 72-51-41-410-052-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.

Subtask 72-51-41-440-051-A ** ON A/C NOT FOR ALL

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

Subtask 72-51-41-410-053-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).

Subtask 72-51-41-710-051-A ** ON A/C NOT FOR ALL

D. Do an oil leak test (Ref. AMM TASK 71-00-00-710-012).

NOTE: Leak test must be performed prior to installation of exhaust cone.

Subtask 72-51-41-410-060-A ** ON A/C NOT FOR ALL

E. Install the exhaust cone (Ref. AMM TASK 78-11-12-400-010).

[Rev.10 from 2021] 2026.04.01 13:01:23 UTC