Removal of the Stage 10 Air Solenoid Valve [IAE]

TASK 75-23-52-000-010-A
Removal of the Stage 10 Air Solenoid Valve

FIN: 4028KS ** 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
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)
Stage 10 Air Solenoid Valve

3. Job Set-up
Subtask 75-23-52-941-050-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 75-23-52-010-050-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.

4. Procedure
Subtask 75-23-52-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Stage 10 Air Solenoid Valve
(1) Cut and discard the lockwire and disconnect the HP3 air outlet tube (3) from the stage 10 air solenoid valve (9).
(2) Remove the HP3 air inlet tube.
(a) Cut and discard the lockwire and disconnect the HP3 air inlet tube (2) from the valve (9).
(b) Cut and discard the lockwire and disconncet the air inlet tube from the HP3 air tube (1).
(c) Remove the HP3 air inlet tube.
(3) Disconnect the electrical connector 4028KS-A (6) from the valve (9).
(4) Remove the stage 10 air solenoid valve.
(a) Remove the bolts (8) and the washers (7) which attach the valve (9) to the mounting bracket (4).
(b) Remove the valve (9).

Subtask 75-23-52-620-050-A ** ON A/C NOT FOR ALL

B. Put the applicable COVER - BLANKING on all of the openings.

[Rev.10 from 2021] 2026.04.01 03:11:20 UTC