Removal of the Bleed Pressure-Regulator Valve

TASK 36-11-52-000-040-A
Removal of the Bleed Pressure-Regulator 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.

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

ZONE: 453
FIN: 4001HA ** 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)-ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	AR	WRENCH - CROWFOOT

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
453	HOT SECTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

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 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 78-30-00-481-041-A	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
Bleed Pressure-Regulator Valve
Engine Bleed Air Ducts

3. Job Set-up
Subtask 36-11-52-861-056-A ** ON A/C NOT FOR ALL

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).

Subtask 36-11-52-941-062-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) On the AIR COND panel 30VU:

make sure that the ENG 1(2) BLEED pushbutton switch is released (the OFF legend is on),
make sure that the APU BLEED pushbutton switch is released (the ON legend is off),
put a WARNING NOTICE(S) to tell persons not to operate the pneumatic system.

(3) On the ENG panel 115VU:

put a WARNING NOTICE(S) to tell persons not to start the engine 1(2).

(4) On the HP ground connector:

Put a WARNING NOTICE(S) to tell persons not to pressurize the pneumatic system.

(5) On the ENG section of the maintenance panel 50VU:

make sure that the ON legend of the ENG/FADEC GND PWR 1(2) pushbutton switch is off,
put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 36-11-52-865-063-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/ENG 1/CTL	3HA1	D12
49VU	AIR BLEED/ENG 1/MONG	2HA1	D11
122VU	AIR BLEED/ENG 2/CTL	3HA2	Z23
122VU	AIR BLEED/ENG 2/MONG	2HA2	Z22

Subtask 36-11-52-010-058-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below the engine.

Subtask 36-11-52-040-052-A ** ON A/C NOT FOR ALL

E. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 36-11-52-010-063-A ** ON A/C NOT FOR ALL

F. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure

CAUTION: USE TWO WRENCHES DURING DISCONNECTION OF THE SENSE LINE, ONE TO MAINTAIN THE FIXED NUT AND THE SECOND ONE TO LOOSEN/TIGHTEN THE SENSE LINE COUPLING.

NOTE: Some pressure can stay in the ducting. The pressure will decrease when you release the clamps.

Subtask 36-11-52-020-061-A ** ON A/C NOT FOR ALL

A. Removal of the Bleed Pressure-Regulator Valve
(1) If you use the APU to energize the electrical circuits, stop the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM D/O 49-00-00-86)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

(2) In the cockpit, on the SD bleed page:
(a) Make sure that the pressure and the temperature of the bleed-air duct system are in ambient conditions.

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

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

(3) On the right side:
(a) Disconnect the electrical connector from the bleed pressure-regulator valve (20).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Disconnect the sense lines that follow from the valve (20) with a WRENCH - CROWFOOT:
1 The sense line (35) between the bleed pressure-regulator valve and the HP bleed valve.
2 The sense line (40) between the bleed pressure-regulator valve and related control solenoid.
(d) Put the PLUG-BLANKING in each disconnected line end.
(4) On the left side:
(a) Loosen the coupling (45) but do not remove it.
(b) Remove the couplings (30), the seals (25) and the valve (20).
(c) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 04:09:42 UTC