Deactivation of the Bleed Pressure-Regulator Valve

TASK 36-11-00-040-809-A
Deactivation of the Bleed Pressure-Regulator Valve

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

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: YOU MUST NOT TOUCH HOT PARTS WITHOUT APPLICABLE GLOVES. HOT PARTS CAN CAUSE AN INJURY.

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 4001HA1
FIN: 4001HA2

1. Reason for the Job
MMEL 36-11-02A
ENGINE BLEED VALVE (PRV)
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	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - HEXAGONAL
No specific	Torque wrench: range to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.357500)	NEVERSEEZ REGULAR GRADE
(Material No.357700)	NEVER-SEEZ PURE NICKEL SPECIAL

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

D. 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 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-22-00-790-803-A	Leak Check on all the Bleed Air Ducts and the Pack Components
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
TASK 31-37-73-00	AIDS - ENGINE REPORTS - DESCRIPTION AND OPERATION
Bleed Pressure-Regulator Valve

3. Job Set-up
Subtask 36-11-00-861-146-A

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

Subtask 36-11-00-860-114-A

B. Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 36-11-00-941-144-A

C. Safety Precautions
(1) Make sure that the ENG 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(2) On ENG panel 115VU:

Put a WARNING NOTICE(S) to tell persons not to start ENG 1(2).

(3) On 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 SYSTEM.

(4) On 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.

(5) On the HP ground connector:

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

Subtask 36-11-00-865-133-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-00-010-181-A

E. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR

Subtask 36-11-00-010-182-A

F. Open the right thrust-reverser cowl-doors (Ref. AMM TASK 78-36-00-010-806):
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL and 452AR.
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL and 462AR.
(3) Put the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position below the engine.

4. Procedure
Subtask 36-11-00-040-122-A

A. Deactivation of the Bleed Pressure-Regulator Valve (PRV) (4001HA)

WARNING: DO NOT TOUCH THE BLEED VALVE COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

CAUTION: CAREFULLY ALIGN THE LOCKING PIN WITH THE DEACTIVATING HOUSING ON THE VALVE. IF YOU ALIGN IT INCORRECTLY OR IF YOU TIGHTEN IT TOO MUCH, THE LOCKING PIN CAN REMAIN IN POSITION AND YOU CAN CAUSE DAMAGE TO THE LOCKING PIN THREAD.

(1) On the PRV (4001HA):
(a) Make sure the manual override control is in the CLOSED position:
1 If necessary, use a WRENCH - HEXAGONAL to set the manual override control to the CLOSED position.
(b) Use a WRENCH - HEXAGONAL to remove the locking pin (1) from its storage port.
(c) Install the locking pin as follows:

CAUTION: BEFORE YOU INSTALL THE LOCKING PIN OR SAFETY SCREW OR SPECIAL SCREW OR KNURLED SCREW, YOU MUST APPLY NEVER-SEEZ REGULAR GRADE. IF YOU DO NOT APPLY IT, YOU CAN CAUSE DAMAGE TO THE MANUAL OVERRIDE CONTROL OF THE VALVE.

1 Apply NEVERSEEZ REGULAR GRADE (Material No.357500) or NEVER-SEEZ PURE NICKEL SPECIAL (Material No.357700) on the locking pin (1).
2 On the manual override control:
a Lock the manual override control with the locking pin (1):
3 TORQUE the locking pin (1) to between 0.5 and 0.4 m.daN (44.25 and 35.40 lbf.in )

.
(2) Put a WARNING NOTICE(S) in the cockpit to tell the crew that the left(right) PRV (4001HA) is closed and deactivated.

Subtask 36-11-00-040-123-A

B. Deactivation of the Bleed Pressure-Regulator Valve
(1) On the ECAM control panel, push the BLEED key (on the lower ECAM DU, the BLEED page comes into view).
(a) On the lower ECAM DU, on the BLEED page:

Make sure that the related bleed-valve symbol shows closed in green.

Subtask 36-11-00-790-068-A

C. Check of the Bleed Air Ducts
(1) Get the post flight report (Ref. AMM D/O 31-37-73-00).
(a) If the class 1 fault message PRESS REG-V 4001HA1(2) and the ECAM warning AIR ENG 1(2) BLEED FAULT come into view during the flight phases 3, 4 or 5, get the ENG TAKE OFF REPORT on the MCDU and do a check of the pack values:
1 If the pack value is 00 or 01 (the pack was off during the last take off):
a Do the leak check of all the bleed air ducts and the pack components (Ref. AMM TASK 36-22-00-790-803).
b Do a visual inspection of the bleed air ducts and the equipment which are installed downstream of the Overpressure Valve (OPV) (along the pylon, wing and the center fuselage to the starter valves, flow control valves, wing anti-ice valves, HP ground connectors and the APU check valve but not the wing anti-ice ducting). Make sure that there is no deformation and be very careful when you do the check of the bellows.

If there is damage or deformation, repair or replace the damaged duct or equipment.

5. Close-up
Subtask 36-11-00-410-170-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Close the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
451AL and 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
461AL and 462AR.

Subtask 36-11-00-410-171-A

B. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

Subtask 36-11-00-865-135-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR BLEED/ENG 2/MONG	3HA2	D12
49VU	AIR BLEED/ENG 1/CTL	2HA1	D11
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-11-00-860-115-A

D. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 36-11-00-869-125-A

E. Make an entry in the logbook.

Subtask 36-11-00-862-129-A

F. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:06:35 UTC