Leak Test of the Bleed-Pressure Regulator Valve with the Engine in Operation

TASK 36-11-52-790-010-A
Leak Test of the Bleed-Pressure Regulator Valve with the Engine in Operation

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 LANDING GEAR GROUND SAFETIES AND THE WHEEL CHOCKS ARE IN POSITION. MOVEMENT OF THE AIRCRAFT CAN BE DANGEROUS.

CAUTION: DO NOT MOTOR THE ENGINE WITH EITHER THE FAN COWLS OR THRUST REVERSER HALVE(S) OPEN WHEN THE WIND SPEED IS 50 MPH (80 KM/H) OR MORE. OTHERWISE INJURY AND/OR DAMAGE TO THE ENGINE CAN OCCUR.

CAUTION: MAKE SURE THE FAN COWLS AND THRUST REVERSER HALVES ARE SECURELY HELD OPEN DURING MOTORING. MAKE SURE HOLD OPEN RODS ARE SERVICEABLE.

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL
FIN: 4001HA ** ON A/C NOT FOR ALL

1. Reason for the Job
Do this test after removal/installation of the bleed pressure regulator valve to make sure that:

there are no leaks on the removed parts
the electrical connectors are correctly installed.
You must start the engines to do this procedure.

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	AR	FOIL - ALUMINUM
No specific	1	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V02-147)	lockwire
(Material No.V06-032)	developer, dry

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
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 71-00-00-710-018-A	Discontinued Start, Restart and Shutdown Procedures
TASK 71-00-00-710-043-A	Normal Engine Automatic-Start Procedure
TASK 71-00-00-710-047-A	Normal Engine Manual-Start Procedure
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves

3. Job Set-up
Subtask 36-11-52-860-070-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-52-941-069-A ** ON A/C NOT FOR ALL

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

(3) On the HP ground connector:

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

Subtask 36-11-52-010-083-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 36-11-52-040-072-A ** ON A/C NOT FOR ALL

D. Deactivate the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-52-010-093-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(2) Put an ACCESS PLATFORM 1M(3 FT) at the bleed pressure regulator valve.

4. Procedure
Subtask 36-11-52-480-057-A ** ON A/C NOT FOR ALL

A. Preparation for the Leak Test
(1) There are two procedures to find the location of an air leak, at a pneumatic joint.

NOTE: Apply dry developer only on the connections of the removed pneumatic components. Do not apply dry developer on all the pneumatic components.

You can apply V06-032developer, dry around the pneumatic joints or you can install FOIL - ALUMINUM around the pneumatic joint locations.
Use the steps that follow to apply foil, aluminum to the pneumatic joint locations.
(a) Wind the foil wrap around the joint one time.
(b) Twist the seam of the foil wrap tight.
(c) Make the foil wrap as tight as possible on the tube but do not rip the wrap.
(d) Attach the foil wrap at the two sides of the pneumatic joint with lockwire (Material No.V02-147) .

Subtask 36-11-52-410-076-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-52-440-065-A ** ON A/C NOT FOR ALL

C. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-52-410-086-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 36-11-52-720-058-A ** ON A/C NOT FOR ALL

E. Do this Test
(1) On ECAM control panel 11VU, push the BLEED key:
(a) 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 bleed-pressure regulator valve is in the closed position.

(3) Start the related engine with the automatic or manual start procedure (Ref. AMM TASK 71-00-00-710-043) or (Ref. AMM TASK 71-00-00-710-047) and keep the engine RPM to idle.
(4) On AIR COND panel 30VU:
(a) Push the ENG 1(2) BLEED pushbutton-switch (OFF legend goes off).
(b) Push the PACK 1 and PACK 2 pushbutton switches (OFF legend goes off).
(5) After 5 minutes, on the lower ECAM DU, on the BLEED page:

Make sure that the related bleed-pressure regulator valve is in the open position.

NOTE: The pressure that the engine supplies is equal to or more than 30 psi (2.0684 bar). For the reduced ground idle engines, Airbus recommends to increase the thrust to keep the pressure equal to or more than 30 psi (2.0684 bar).

(6) Do the engine shutdown procedure (Ref. AMM TASK 71-00-00-710-018).

Subtask 36-11-52-010-094-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 36-11-52-040-073-A ** ON A/C NOT FOR ALL

G. Deactivate the Thrust Reverser

(1) Deactivate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 36-11-52-010-084-A ** ON A/C NOT FOR ALL

H. Get Access
(1) Open the thrust reverser doors (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-52-080-057-A ** ON A/C NOT FOR ALL

I. Make sure that there are no leaks at the junction between the bleed pressure regulator valve, the sense lines and the duct 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 used to do the leak test.

5. Close-up
Subtask 36-11-52-410-077-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 thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 36-11-52-440-066-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 36-11-52-410-087-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).

Subtask 36-11-52-860-071-A ** ON A/C NOT FOR ALL

D. Put the aircraft back to its initial configuration.
(1) On the AIR control panel 30VU:

release the ENG BLEED pushbutton switches (OFF legends come on).

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

Subtask 36-11-52-862-061-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:12:57 UTC