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

TASK 72-51-41-000-010-B
Removal of the No.5 Bearing Compartment Cover

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)
IAE1P17038	1	PULLER

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-11-12-000-010-A	Removal of the Engine Exhaust Cone
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
Removal of the No.5 Bearing Compartment Cover

3. Job Set-up
Subtask 72-51-41-941-052-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 72-51-41-010-055-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) - ADJUSTABLE in to position.

Subtask 72-51-41-040-053-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 72-51-41-010-056-A ** ON A/C NOT FOR ALL

D. Remove the exhaust cone (Ref. AMM TASK 78-11-12-000-010).

4. Procedure
Subtask 72-51-41-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the N°5 Bearing Compartment Cover (2)

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

(1) Remove the 13 bolts that attach the compartment cover to the exhaust case.
(2) Remove the rear thermal blancket.
(3) Make sure that the three jaws of the IAE1P17038 PULLER, are in the outward position.
(4) Engage the removal puller on to the compartment cover. Make sure that the three jaws are correctly engaged behind the flange at the compartment cover.
(5) Slide the ring over the jaws to hold the slide puller jaws in place.
(6) Move the knocker puller rearwards quickly to hit the handle.
(7) Do step (6) until the compartment cover (2) is free from the exhaust case.
(8) Remove the ring from the jaws. move the jaws outwards until the compartment cover is free from the slide puller.
(9) Inspect the seal on the compartment cover.
(a) If a packing is installed (PRE SBE 72-0173) remove and discard it.
(b) If a seal is installed (SBE 72-0173) examine the condition of the seal as follows:
1 Inspect the seal for damage. If the seal is damaged remove and the seal.
2 If the seal is not damaged, do not remove the seal.

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