Installation of the Bleed Pressure-Regulator Valve

TASK 36-11-52-400-802-A
Installation 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 AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: ALWAYS USE APPLICABLE GLOVES TO TOUCH HOT PARTS. HOT PARTS CAN CAUSE INJURY TO PERSONS.

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

ZONE: 454
ZONE: 464
FIN: 4001HA1 ** ON A/C NOT FOR ALL
FIN: 4001HA2 ** 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	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	HAMMER - FIBER
No specific	1	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU5-0005)	anti-seize compound
(Material No.PU5-0005A)	Royco 81 MS Anti-Seize Compound
(Material No.PU5-0005B)	PT 605 Anti-Seize Compound

C. Work Zones and Access Panels

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

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
1	SEAL	AIPC 36-11-86-20-270

E. 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 24-41-00-862-002-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 36-11-41-400-802-A	Installation of the Environmental Control System (ECS) Mid-Y Duct and the Intermediate Pressure Check Valve (IPCV)
TASK 36-11-49-400-822-A	Installation of the Environmental Control System (ECS) Ducts
TASK 36-11-49-400-823-A	Installation of the Environmental Control System (ECS) Sense Lines
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 71-00-00-790-802-A	Test No. 1 - Pneumatic Leak Test
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Bleed Pressure-Regulator Valve

3. Job Set-up
Subtask 36-11-52-860-104-A ** ON A/C NOT FOR ALL

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) On AIR COND panel 30VU:
(a) Make sure that the ENG 1(2) BLEED pushbutton-switch is released (OFF legend on).
(b) Make sure that the APU BLEED pushbutton-switch is released (ON legend off).
(c) Make sure that the WARNING NOTICE(S) is in the position to tell persons not to operate the pneumatic system.
(3) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(4) On the HP ground connector:
(a) Make sure that the WARNING NOTICE(S) is in the position to tell persons not to pressurize the pneumatic system.

Subtask 36-11-52-865-084-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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 36-11-52-010-197-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
(2) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position below the fan cowl doors.

Subtask 36-11-52-040-130-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser System for 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 maintenance (Ref. AMM TASK 78-30-00-040-805).

4. Procedure
Subtask 36-11-52-420-070-A ** ON A/C NOT FOR ALL

A. Installation 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 the 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: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(3) Install the Pressure Regulating Valve (PRV) (3) as follows:
(a) Remove the COVER - PROTECTION from the PRV (3), harness assembly connector, PRV muscle sense-tube and starter duct.
(b) Visually examine the PRV (3) as follows:
1 Look for the unwanted objects, cracks, corrosion, other damage and correct assembly.
(c) Put a new AIPC 36-11-86-20-270 SEAL (1) and the PRV (3) in the correct position on the starter duct:
1 Make sure the flow direction arrow on the valve is pointed in the correct direction.
(d) Attach the PRV (3) to the starter duct with the V-band coupling (2). Do not torque the V-band coupling (2) at this time.
(e) Install the mid-Y duct and the intermediate pressure check-valve (Ref. AMM TASK 36-11-41-400-802):
1 Do not install the PRV muscle sense-tube at this time.
2 Do not tighten the V-band couplings, bolts, nuts, pylon HP Bleed Valve (HPV) sense-tube or link assemblies at this time.

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

CAUTION: DO NOT GET THE ANTI-SEIZE COMPOUND IN THE SENSE LINES. MAKE SURE THAT YOU APPLY THE ANTI-SEIZE COMPOUND ONLY TO THE THREADS OF THE FITTINGS. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE VALVES CAN OCCUR.

(f) Apply a layer of anti-seize compound (Material No.PU5-0005) or Royco 81 MS Anti-Seize Compound (Material No.PU5-0005A) or PT 605 Anti-Seize Compound (Material No.PU5-0005B) to the threads of the fittings on the PRV muscle sense-tube, the PRV (3) and the starter duct.
(g) Carefully install the PRV muscle sense-tube on the PRV (3) and the starter duct. Do not torque the PRV muscle sense-tube-fittings at this time.

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.

(h) Adjust the PRV (3), HPV, Environmental Control System (ECS) ducts and sense lines as necessary to remove the preload on the ECS system (Ref. AMM TASK 36-11-49-400-822) and (Ref. AMM TASK 36-11-49-400-823).

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN TWIST THE TUBES OR HOSES OR CAUSE DAMAGE TO THEM.

(i) Torque the PRV muscle sense-tube-fittings (Ref. AMM TASK 36-11-49-400-823).
(j) Torque the V-band couplings, bolts, nuts, link assemblies and pylon HPV sense-tube-fitting (Ref. AMM TASK 36-11-41-400-802).
(k) Put the V-band coupling (2) in the correct position:
1 Put the V-band coupling (2) latch adjacent to the latch arrow on the starter duct.
(l) Torque the V-band coupling (2) that attaches the PRV (3) as follows:
1 TORQUE the V-band coupling (2) to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )

.
2 Tap around the outer surface of the V-band coupling (2) with a HAMMER - FIBER.
3 TORQUE the V-band coupling (2) again to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )

.
4 Tap around the outer surface of the V-band coupling (2) again with a HAMMER - FIBER.
5 TORQUE the V-band coupling (2) a third time to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )

.
6 Tap around the outer surface of the V-band coupling (2) again with a HAMMER - FIBER.
7 TORQUE the V-band coupling (2) to between 125 and 115 lbf.in (1.41 and 1.30 m.daN )

.
8 Make sure that two full threads are shown on the V-band coupling (2).

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR IS CLEAN BEFORE YOU CONNECT IT. DIRTY ELECTRICAL CONNECTORS CAN CAUSE THRUST REVERSER PROBLEMS.

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.

(m) Connect the ECS electrical harness as follows:
1 Make sure that the electrical connector is clean and in the correct condition.
2 Connect the ECS harness connector to the PRV (3).
3 Tighten the connector with your hand. Turn the connector 1/4 turn more with the PLIERS - CONNECTOR, JAW, SOFT.
(n) Make sure that the PRV (3), pylon HPV sense-tube, PRV muscle sense-tube and HPV muscle sense-tube are correctly installed:
1 Make sure that the PRV (3), pylon HPV sense-tube, PRV muscle sense-tube and HPV muscle sense-tube are not damaged.
2 Make sure that the V-band coupling (2) is in the correct position and correctly engages and aligns with the PRV (3) and the adjacent ducts.
3 Make sure that the PRV (3), the mid-Y duct and the starter duct are correctly aligned.
4 Make sure that the V-band coupling (2) is in the correct position and is correctly engaged.

Subtask 36-11-52-865-085-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR 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 36-11-52-720-132-A ** ON A/C NOT FOR ALL

C. Test
(1) Do the test No. 1 - pneumatic leak test (Ref. AMM TASK 71-00-00-790-802).

5. Close-up
Subtask 36-11-52-410-188-A ** ON A/C NOT FOR ALL

A. 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 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 36-11-52-440-120-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 36-11-52-410-189-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

Subtask 36-11-52-862-112-A ** ON A/C NOT FOR ALL

D. 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 01:12:45 UTC