Removal of the Bleed Control Valve (APS 3200)

TASK 49-51-53-000-001-A
Removal of the Bleed Control Valve (APS 3200)

WARNING: DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

ZONE: 310

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	CONTAINER 3 L(3/4 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
310	FUSLG TAIL SECTION AFT OF AFT PRESS BHD
315AL, 316AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 52-41-00-010-001-A	Open the APU Doors for Access
Bleed Control Valve

3. Job Set-up
Subtask 49-51-53-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On overhead panel 25VU, on the APU section, make sure that the APU MASTER SW switch is in the off position (the ON legend is off).
(3) Put the WARNING NOTICE(S) in position in the cockpit to tell persons not to start the APU.
(4) Make sure that the hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).

Subtask 49-51-53-865-050-A ** ON A/C NOT FOR ALL

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41

Subtask 49-51-53-010-050-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below APU access doors 315AL and 316AR.
(2) Open APU access doors 315AL and 316AR (Ref. AMM TASK 52-41-00-010-001).
(3) Set the light switch 11LJ to the ON position.

4. Procedure
Subtask 49-51-53-020-050-D ** ON A/C NOT FOR ALL

A. Removal of the Bleed Control Valve

CAUTION: YOU MUST USE TWO WRENCHES AND HOLD THE COMPONENT WHEN YOU REMOVE/INSTALL THE PIPE COUPLINGS AND/OR UNIONS. THIS PREVENTS DAMAGE TO THE COMPONENT.

CAUTION: PUT PLASTIC CAPS OR PLUGS ON ALL FUEL AND/OR LUBRICATION SYSTEM COMPONENTS AND LINES. IF YOU USE TAPE, CLOTH, OR METAL CAPS ON THEM, YOU CAN DAMAGE THE APU.

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTORS ARE CLEAN BEFORE YOU DISCONNECT OR CONNECT THEM. CONTAMINATION ON THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.

(1) Disconnect electrical connector P33 (7) from the bleed control valve (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Remove the bolt (12) and the clamp (11) that attach the cable harness to the clamp-bracket support assembly (10).
(4) Remove the bolt (15) and the clamp (14) that attach the cable harness to the clamp-bracket support assembly (13).
(5) Remove the bolt (28) and the clamp (27) that attach the cable harness to the bleed control valve (1).
(6) Put the CONTAINER 3 L(3/4 USGAL) below the bleed control valve (1).
(7) Disconnect the two ends of the tubes (25), (26), (4) and (9).
(8) Disconnect the tubes (22), (21), (23) and (24) from the bleed control valve (1).
(9) Remove the V-band clamp (17) from the outlet duct (16).
(10) Remove and discard the packing (18).
(11) Remove the V-band clamp (20) from the ECS duct (19).
(12) Remove the V-band clamp (2) from the exhaust duct (3).
(13) Remove the bleed control valve (1) from the APU.
(14) Remove the filler plug (6) from the bleed control valve (1):
(a) Remove the bolts (8) from the filler plug (6).
(b) Remove the filler plug (6).
(c) Remove and discard the packing (5).
(15) Put the PLUG-BLANKING in each disconnected line end.
(16) Remove the CONTAINER 3 L(3/4 USGAL).

[Rev.10 from 2021] 2026.04.01 12:41:53 UTC