Installation of the Bleed-Pressure Regulator Valve (PRV)

TASK 36-11-52-400-804-A
Installation of the Bleed-Pressure Regulator Valve (PRV)

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

ZONE: 454
ZONE: 464
FIN: 4001HA1
FIN: 4001HA2

1. Reason for the Job
Two persons are necessary to do this task
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	FOIL - ALUMINUM
No specific	AR	HAMMER - FIBER
No specific	1	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.41 and 1.3 m.daN (124.78 and 115.04 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP3010)	Ardrox 9D4A
(Material No.CP8004)	lockwire 0.6 mm (0.0236 in.) dia
(Material No.08CKB9)	Cleaner-Hydraulic Spillage Absorbent powder -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
454	HOT SECTION
464	HOT SECTION
191DB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 462AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
5	SEAL	AIPC 36-11-49-05-030
9	SEAL	AIPC 36-11-49-05-030

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-22-910-001-A	Marking of the Unions after Application of Standard or Specific Tightening Torque
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 24-41-00-862-002-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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 36-11-00-740-804-A	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
TASK 36-11-49-000-831-A	Removal of the Indicating Tubes on the Environmental Control System (ECS) Ducts
TASK 36-11-49-400-827-A	Installation of the Environmental Control System (ECS) Ducts from the Engine Case Ports to the Pylon Connections
TASK 36-11-49-400-831-A	Installation of the Indicating Tubes on the Environmental Control System (ECS) Ducts
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 71-00-00-860-827-A	Start the Engine (Normal Automatic Start)
TASK 71-00-00-860-828-A	Start the Engine (Normal Manual Start)
TASK 71-00-00-860-829-A	Engine Shutdown
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 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
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
Bleed-Pressure Regulator Valve

3. Job Set-up
Subtask 36-11-52-860-105-A

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).
(2) In the cockpit, on AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (the OFF legend is on).
(b) Make sure that the APU BLEED pushbutton-switch is released (the ON legend is off).
(c) Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate the pneumatic system.
(3) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch is in the OFF position for a minimum of five minutes before you do this procedure.
(c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:

The ENG/MODE selector switch
The ENG/MASTER 1(2) control switch.

(4) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR 1(2) pushbutton-switch is off.
(b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(5) On access door 191DB, on the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the pneumatic system.

Subtask 36-11-52-865-089-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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 36-11-52-010-206-A

C. Get Access
(1) Make sure that the fan cowl doors are open (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
(2) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR
(3) Make sure that the ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE is in position.

Subtask 36-11-52-040-134-A

D. Deactivation of the Thrust Reverser System for Nacelle Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

4. Procedure
Subtask 36-11-52-420-073-A

A. Installation of the PRV
(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).

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.

(3) Do an inspection of the component interfaces and the adjacent area.
(4) Clean the component interfaces and the adjacent area.
(5) Make sure that the parts retained from the removed component are clean and in the correct condition.
(6) Make sure that you disconnected the muscle sense tube (1) from the Environmental Control System (ECS) Y-duct (10) (Ref. AMM TASK 36-11-49-000-831).
(7) Remove the PLUG-BLANKING from each disconnected line end.
(8) Remove the blanking plugs from the PRV (11).
(9) Do a visual inspection of the PRV (11) as follows:
(a) Make sure that there is no FOD contamination in the PRV (11).
(b) Make sure that there are no cracks, corrosion or other damage.
(10) Move the ECS Y-duct (10) and ECS pylon duct (4) a small distance as necessary to get sufficient clearance.
(11) Put the PRV (11) in position as follows:

CAUTION: MAKE SURE THAT THE KEYWAY ON THE VALVE IS ENGAGED WITH THE KEY ON THE DUCT. IF THE POSITION OF THE KEYWAY IS NOT CORRECT, DAMAGE TO THE VALVE AND ITS PARTS CAN OCCUR.

(a) Put the new AIPC 36-11-49-05-030 SEAL (5) , AIPC 36-11-49-05-030 SEAL (9) and the PRV (11) in their correct installation positions between the ECS Y-duct (10) and the ECS pylon duct (4).
(b) Make sure that the flow direction arrow on the valve points in the correct direction.
(12) Install the two V-band couplings (6) and (8). Do not torque the V-band couplings (6) and (8) at this time:
(a) Make sure that the positions of the V-band couplings (6) and (8) agree with the positions that you recorded during the removal.
(13) Connect the PRV muscle sense-tube (3) to the PRV (11) (Ref. AMM TASK 36-11-49-400-831) and not to torque the PRV muscle sense-tube-fittings at this time.
(14) Adjustment

CAUTION: MAKE SURE THAT:

THERE IS NO TENSION ON THE LINK ASSEMBLIES FOR THE ECS DUCTS
THE MATING SURFACES BETWEEN THE DUCTS CORRECTLY ALIGN.

TENSION AND INCORRECT ALIGNMENT CAN CAUSE AIR LEAKAGE, WHICH CAN CAUSE DAMAGE TO THE EQUIPMENT.

(a) Adjust the PRV (11), the ECS Y-duct (10) and the ECS pylon duct (4) as necessary to remove the preload from the ECS system (Ref. AMM TASK 36-11-49-400-827).
(15) Torque the V-band couplings (6) and (8) that attach the PRV (11) as follows:
(a) TORQUE the V-band couplings (6) and (8) to between 1.41 and 1.3 m.daN (124.78 and 115.04 lbf.in )

.
(b) Tap around the outer surfaces of the V-band couplings (6) and (8) with a HAMMER - FIBER.
(c) TORQUE the V-band couplings (6) and (8) a second time to between 1.41 and 1.3 m.daN (124.78 and 115.04 lbf.in )

.
(d) Tap around the outer surfaces of the V-band couplings (6) and (8) again with the HAMMER - FIBER.
(e) TORQUE the V-band couplings (6) and (8) a third time to between 1.41 and 1.3 m.daN (124.78 and 115.04 lbf.in )

.
(f) Tap around the outer surfaces of the V-band couplings (6) and (8) again with the HAMMER - FIBER.
(g) TORQUE the V-band couplings (6) and (8) to between 1.41 and 1.3 m.daN (124.78 and 115.04 lbf.in )

.
(h) Make sure that the two full threads are shown on the V-band couplings (6) and (8).
(i) Identify the tightened union nuts with a red line
(Ref. AMM TASK 20-23-22-910-001).
(16) Tighten the fitting on the PRV muscle sense-tube (3) (Ref. AMM TASK 36-11-49-400-831).
(17) Connect the ECS electrical harness as follows:

CAUTION: USE TEFLON-JAWED PLIERS TO LOOSEN/TIGHTEN ELECTRICAL CONNECTORS. DO NOT USE METAL-JAWED PLIERS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE ELECTRICAL CONNECTORS CAN OCCUR.

(a) Make sure that all the electrical connections are clean and in the correct condition.
(b) Remove the CAP-BLANKING from each electrical connector and receptacle.
(c) Connect the ECS harness-assembly connector (2) to the PRV (11).
(d) Tighten the connector with your hand and then turn the connector a quarter more with a PLIERS - CONNECTOR, JAW, SOFT.
(18) Install the fitting on the muscle sense tube (1) (Ref. AMM TASK 36-11-49-400-831).
(19) Install the indicating tube (12) on the ECS Y-Duct (10) and the High Pressure Valve (HPV) (Ref. AMM TASK 36-11-49-400-831).
(20) Make sure that the muscle sense tube (1) and the PRV muscle sense-tube (3) are not damaged and that they are correctly installed (Ref. AMM TASK 36-11-49-400-831).
(21) Make sure that the PRV (11), the ECS Y-duct (10) and the ECS pylon duct (4) are correctly aligned.
(22) Make sure that the V-band couplings (6) and (8) are correctly installed, engaged and aligned on the PRV (11).
(23) Make sure that you have identified the tightened union nuts of the V-band couplings (6) and (8) with a red line.
(24) Make sure that the fittings of the indicating tube (12) are not damaged and that they are correctly installed (Ref. AMM TASK 36-11-49-400-831).

Subtask 36-11-52-480-136-A

B. Preparation for the Leak Test.
(1) Find the location of a pneumatic joint air-leak with one of the two procedures that follow:
(a) Apply Cleaner-Hydraulic Spillage Absorbent powder - (Material No.08CKB9) or Ardrox 9D4A (Material No.CP3010) around the pneumatic joints, only on the connections of the removed pneumatic components.

NOTE: Airbus recommends that you do not apply dry developer on all the pneumatic components.

(b) Install an FOIL - ALUMINUM around the pneumatic joint locations:
1 Wind the foil wrap around the joint one time.
2 Twist the seam of the foil wrap to make it tight.
3 Make the foil wrap as tight as possible on the tube, but do not cause damage to the wrap.

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

4 Attach the foil wrap with CP8004lockwire 0.6 mm (0.0236 in.) dia on the two sides of the pneumatic joint.

Subtask 36-11-52-410-194-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 36-11-52-440-123-A

D. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 36-11-52-865-090-A

E. 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 36-11-52-860-106-A

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

Subtask 36-11-52-720-135-A

G. Do this Test
(1) On ECAM control-panel 11VU, push the BLEED key (on the lower ECAM DU, the BLEED page comes into view).
(2) On the lower ECAM DU, on the BLEED page:

Make sure that the related PRV bleed valve is shown closed.

(3) Start the related engine with the normal automatic start procedure (Ref. AMM TASK 71-00-00-860-827) or normal manual start procedure (Ref. AMM TASK 71-00-00-860-828) and keep it at idle.
(4) On AIR COND panel 30VU:

Push the ENG 1(2) BLEED pushbutton switch (the OFF legend goes off).

(5) After five minutes, on the lower ECAM DU, on the BLEED page:

Make sure that the related PRV bleed valve is shown open.

(6) Stop the engine (Ref. AMM TASK 71-00-00-860-829).
(7) Do the BITE Test of the Engine-Bleed-Air System (Ref. AMM TASK 36-11-00-740-804).

Subtask 36-11-52-865-091-A

H. 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 36-11-52-040-135-A

I. Deactivation of the Thrust Reverser System for Nacelle Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).

Subtask 36-11-52-010-207-A

J. Open the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-806):
(1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
452AR
(2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
462AR

Subtask 36-11-52-080-134-A

K. Make sure that there are no leaks at the junction of the removed pneumatic components on the related engine.

NOTE: There is a leak when the foil installed on the duct breaks or when it is too hot.
There is a leak when the leak air removes the dry developer from the junction.

(1) Remove the materials that you used to do the leak test.

5. Close-up
Subtask 36-11-52-860-107-A

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

Subtask 36-11-52-865-092-A

B. 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 36-11-52-410-195-A

Subtask 36-11-52-440-124-A

D. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 36-11-52-410-196-A

E. 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 36-11-52-862-115-A

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

[Rev.10 from 2021] 2026.04.01 12:38:11 UTC