Removal of the HPC Stage 10 Bleed Valve [IAE]

TASK 75-32-54-000-010-A
Removal of the HPC Stage 10 Bleed Valve

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.

FIN: 4001JM ** 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 1M(3 FT)
No specific	AR	COVER - BLANKING
No specific	AR	WARNING NOTICE(S)

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening 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 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
HP Compressor Stage 10 Bleed Valve

3. Job Set-up
Subtask 75-32-54-941-050-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 75-32-54-010-053-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 1M(3 FT) in position.

Subtask 75-32-54-040-050-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 75-32-54-010-050-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

4. Procedure
Subtask 75-32-54-010-051-A ** ON A/C NOT FOR ALL

A. Remove the Silencer and the Seal Carrier

Pre SBE 75-0072 and Pre SBE 75-0093
(1) Remove the nuts (3) and the bolts (5) which attach the silencer (6) and the seal carrier (4) to the bleed valve (7).
(2) Remove the silencer and the seal carrier.

SBE 75-0072 and Pe SBE 75-0093
(3) Remove the nuts (3) and the bolts (12) which attach the silencer and seal carrier assembly (11) to the bleed valve (7).
(4) Remove the silencer and seal carrier assembly.

SBE 75-0093
(5) Remove the nuts (3) and the bolts (5) which attach the silencer (13) to the bleed valve (7).
(6) Remove the silencer (13).

Subtask 75-32-54-020-050-A ** ON A/C NOT FOR ALL

B. Remove the HPC Stage 10 Bleed Valve 4001JM
(1) Disconnect the air operation tube

HP Compressor Stage 10 Bleed Valve ** ON A/C NOT FOR ALL

(a) Cut and discard the lockwire that safeties the air operation tube (8).
(b) Disconnect the tube from the connection on the bleed valve (7).
(2) Disconnect the two brackets from the bleed valve support duct flange
(a) Remove the nuts (10) and the bolts (9) that attach the brackets (1) and (2) to the support duct.
(b) Move the brackets clear of the bleed valve (7).
(3) Remove the bleed valve
(a) Hold the bleed valve (7) and remove the nuts (10) and the bolts (9) which attach the bleed valve to the support duct.
(b) Remove the bleed valve.

Subtask 75-32-54-620-050-A ** ON A/C NOT FOR ALL

C. Put the applicable COVER - BLANKING on the openings.

[Rev.10 from 2021] 2026.04.01 13:00:40 UTC