Removal of the Low Pressure (LP) Turbine Shaft Blind Cap [IAE]

TASK 72-51-41-000-012-B
Removal of the Low Pressure (LP) Turbine Shaft Blind Cap

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)
IAE1P17039	1	PULLER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
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 72-38-11-000-010-A	Removal of the Inlet Cone
TASK 72-51-41-000-010-B	Removal of the No.5 Bearing Compartment Cover
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
Remove the Blind Cap

3. Job Set-up
Subtask 72-51-41-941-054-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 72-51-41-010-062-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 72-51-41-040-057-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 72-51-41-010-064-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Remove the inlet cone (Ref. AMM TASK 72-38-11-000-010) if necessary.
(2) Remove the exhaust cone (Ref. AMM TASK 78-11-12-000-010).
(3) Remove the No.5 Bearing Compartment Cover (Ref. AMM TASK 72-51-41-000-010).

4. Procedure
Subtask 72-51-41-020-054-A ** ON A/C NOT FOR ALL

A. Remove the LP Turbine Shaft Blind Cap

Remove the Blind Cap ** ON A/C NOT FOR ALL

(1) Remove the internal retaining ring of the blind cap.
(2) Install the IAE1P17039 PULLER 1 off in to the turbine shaft. Make sure that the piston of the slide puller is correctly aligned with the LP turbine shaft.
(3) Move the slide puller forward until the head touches the blind cap. Push the slide puller until the jaws engage in to the groove of the blind cap.
(4) Move the hammer rearward quickly until it hits the grip.
(5) Do step (4) until the blind cap is free from the turbine shaft.
(6) Remove the slide puller and the blind cap from the LP turbine shaft.
(7) Release the head of the slide puller and remove the blind cap.
(8) Remove the sealing ring:

CAUTION: DO NOT DAMAGE THE SLOT SURFACE WHEN YOU REMOVE THE SEALING RING FROM THE SLOT OF THE BLIND CAP WITH HAND TOOLS. DAMAGE TO THE SURFACE CAUSE OIL LEAK.

(a) Remove the sealing ring from the blind cap and discard it.

[Rev.10 from 2021] 2026.04.01 02:46:34 UTC