Leak Check of Engine Bleed Air Supply System and Packs Components through HPGC

TASK 36-11-00-720-004-A
Leak Check of Engine Bleed Air Supply System and Packs Components through HPGC

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.

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

1. Reason for the Job
To make sure that there are no leaks from the air-bleed system downstream of the High Pressure Bleed Valve and Intermediate Pressure Bleed Check Valve. Pressurization through the HP connection and the Bleed Pressure Regulator Valve (PRV) Test Port.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	AIR SOURCE 3 BAR (43.5 PSI) - REGULATED, FILTERED, DRY
No specific	AR	PLUG - BLANKING
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
147AB, 147EB, 191BB, 191BT, 192BT, 192FB, 197BB, 472AR, 482AR, 521AB, 521BT, 521CB, 521EB, 521HB, 522AB, 621AB, 621BT, 621CB, 621EB, 621HB, 622AB
191DB, 481BR
FOR [1000EM1] (ENGINE-1)
437AL, 451AL
413CL, 413DL, 414CR, 414FR
413DT, 471AL, 471AR
FOR [1000EM2] (ENGINE-2)
447AL, 461AL
423DT, 481AL, 481AR
423CL, 423DL, 423FL, 424CR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-33-21-618-001-A-01	Pre-conditioning through the HP Ground Connection
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 36-22-00-790-001-A	Leak Check on all the Bleed Air Ducts and the Packs Components
TASK 53-35-11-000-001-A	Removal of the Wing-to-Fuselage Fairings
TASK 53-35-11-400-001-A	Installation of the Wing-to-Fuselage Fairings
TASK 57-41-37-000-004-A	Removal of the Pressure Relief Panels
TASK 57-41-37-400-002-A	Installation of the Pressure Relief Panels
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
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
TASK 78-36-00-010-040-A	Opening of the Thrust Reverser Doors
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-A	Closing of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Engine Bleed Air Supply System ** ON A/C NOT FOR ALL
Engine Bleed Air Supply System ** ON A/C NOT FOR ALL
FOR [1000EM1] (ENGINE-1)
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
FOR [1000EM2] (ENGINE-2)
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels

3. Job Set-up
Subtask 36-11-00-861-075-A ** ON A/C NOT FOR ALL

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

Subtask 36-11-00-941-073-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) Make sure that the engine 1(2) is shut down for at least 5 minutes.
(2) Put a WARNING NOTICE(S) on the panel 115VU to tell persons not to start the engine 1 (2).
(3) In the cockpit:

put WARNING NOTICE(S) to the persons not to operate the pneumatic system,
put WARNING NOTICE(S) to the persons not to operate the slats,
put WARNING NOTICE(S) to the persons not to operate the APU switch.

(4) On 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 operate the FADEC 1(2).

Subtask 36-11-00-865-052-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR BLEED/X FEED/VALVE/BAT	2HV	D13
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
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

Subtask 36-11-00-010-058-A ** ON A/C NOT FOR ALL

D. Get Access

NOTE: Remove only the applicable access panels in the area where you will do the leak test.

(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the zones 191BB 192FB.
(2) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the zones 521 and 621.
(3) Remove the applicable access panels of the air conditioning units 191BB 192FB.
(4) Remove the applicable access panels on the wings and belly fairings:
(a) For the left wing and belly fairing:

(b) For the right wing and belly fairing:

(5) Remove these access panels on the pylon:
(a) FOR [1000EM1] (ENGINE-1)
413CL 414CR 413DL 414FR
(b) FOR [1000EM2] (ENGINE-2)
423CL 424CR 423DL 423FL.
(6) Open the left fan cowl door (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(7) Open the left thrust-reverser cowl door (Ref. AMM TASK 78-36-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL.

Subtask 36-11-00-010-058-C ** ON A/C NOT FOR ALL

D. Get Access

NOTE: Remove only the applicable access panels in the area where you do the leak test.

(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the zones 191 and 192.
(2) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the zones 521 and 621.
(3) Remove the applicable access panels of the air conditioning units:

191BB 192FB.

(4) Remove the applicable access panels on the wing and belly fairing:
(a) For the left wing and belly fairing:

(b) For the right wing and belly fairing:

Subtask 36-11-00-010-058-F ** ON A/C NOT FOR ALL

D. Get Access

NOTE: Remove only the applicable access panels in the area where you will do the leak test.

(1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the zones 191BB 192FB.
(2) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position below the zones 521 and 621.
(3) Remove the applicable access panels 191BB 192FB of the air conditioning packs.
(4) Remove the applicable access panels on the wings and belly fairings:
(a) For the left wing and belly fairing:

(b) For the right wing and belly fairing:

(5) Remove these access panels on the pylon:
(a) FOR [1000EM1] (ENGINE-1)
413DT 471AR

471AL (Ref. AMM TASK 54-53-11-000-002)

(b) FOR [1000EM2] (ENGINE-2)
423DT 481AL

481AR (Ref. AMM TASK 54-53-11-000-002).

(6) Open the left fan cowl door (Ref. AMM TASK 71-13-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(7) Open the left thrust-reverser cowl door (Ref. AMM TASK 78-32-00-010-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL.
(8) Remove the access panel 191DB.

Subtask 36-11-00-860-056-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) At the HP ground connection area put the AIR SOURCE 3 BAR (43.5 PSI) - REGULATED, FILTERED, DRY in position.
(3) In the air conditioning compartment:

disconnect the water tank, hyd reservoir and trim air valve pressurization interconnection line from the pressure service check valves (7272HM and 7270HM).

(4) Cap the disconnected ends with PLUG - BLANKING.
(5) Do the EIS start procedure (ECAM system only) (Ref. AMM TASK 31-60-00-860-001).
(6) Do the pre-conditioning through the HP ground connector (Ref. AMM TASK 12-33-21-618-001).
(7) On valve-bleed pressure regulator 4001HA:

remove cap from test port,
connect AIR SOURCE 3 BAR (43.5 PSI) - REGULATED, FILTERED, DRY to the test port,
increase and stabilize the pressure to 40 psi (2.75 bar) to open the bleed pressure regulation valve. Check with the manual position indicator that the valve opens.

(8) On the ECAM control panel 11VU:

push the BLEED pushbutton switch (the BLEED page comes into view on the lower display unit of the ECAM system).

(9) On the AIR COND panel 30VU make sure that:

the PACK 1 and PACK 2 pushbutton switches are pushed (the OFF legends are off),
the X BLEED selector switch is set to OPEN (the BLEED page shows that the X BLEED valve is open),
the APU BLEED pushbutton switch is released (the ON legend is off) (the BLEED page shows that the APU BLEED valve is closed).

NOTE: Ignore the warnings that are caused by disagree between ENG 1 BLEED, ENG 2 BLEED pushbutton switches position and the Bleed Pressure Regulator Valve.

(10) On the ANTI-ICE section of the panel 25VU:

make sure that the ANTI-ICE/WING pushbutton switch is released (the ON legend is off).

4. Procedure
Subtask 36-11-00-720-052-A ** ON A/C NOT FOR ALL

A. Leak Check of the Engine Bleed-Air-Supply System
(1) Connect the ground air source to the HP ground connector.
(2) Start the ground air source and slowly increase the pressure until it becomes stable at 30 +1 psi or -1 psi (2.0684 +0.0689 bar or -0.0689 bar).
(3) Do a leak test of all the air ducts, sense lines and clamps, unions and flexible joints on the engine, in the pylons, wings, belly fairing, pack area and AFT cargo compartment (Ref. AMM TASK 36-22-00-790-001).

5. Close-up
Subtask 36-11-00-860-057-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Stop the pressurization of the bleed air ducts with the air source.
(2) Disconnect the air source from the HP connector.
(3) On valve-bleed pressure regulator 4001HA:

stop the pressurization of the valve with the air supply and check that it closes with its manual position indicator,
disconnect the air supply source,
install the cap on test port.

(4) Stop the pre-conditioning through the HP ground connector (Ref. AMM TASK 12-33-21-618-001).
(5) On the ECAM Control Panel set the LOWER DISPLAY and the UPPER DISPLAY potentiometer to OFF.
(6) In the air conditioning compartment:

remove the PLUG - BLANKING.

(7) Connect the water tank, hyd reservoir and trim air valve pressurization interconnection lines to the pressure service check valves (7272HM and 7270HM).
(8) Make sure that the work area is clean and clear of tools and other items.

Subtask 36-11-00-410-058-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the access doors of the air conditioning units:

191BB 192FB.

(2) Close the left thrust-reverser cowl door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL.
(3) Close the left fan cowl door (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(4) Install the access panels on the wings and belly fairing:
(a) For the left wing and belly fairing:

(b) For the right wing and belly fairing:

(5) Install these access panels on the pylon:
(a) FOR [1000EM1] (ENGINE-1)
413CL 414CR 413DL 414FR
(b) FOR [1000EM2] (ENGINE-2)
423CL 424CR 423DL 423FL.
(6) Remove the WARNING NOTICE(S).
(7) Remove the access platform(s).

Subtask 36-11-00-410-058-C ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the access doors of the air conditioning units:

191BB 192FB.

(2) Close the left thrust-reverser cowl door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL.
(3) Close the left fan cowl door (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(4) Install the access panels on the wing and belly fairing:
(a) For the left wing and belly fairing:

(b) For the right wing and belly fairing:

Subtask 36-11-00-410-058-F ** ON A/C NOT FOR ALL

B. Close Access
(1) Close the access doors of the air conditioning packs:

191BB 192FB.

(2) Close the left thrust-reverser cowl door (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL
(b) FOR [1000EM2] (ENGINE-2)
461AL.
(3) Close the left fan cowl door (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL
(b) FOR [1000EM2] (ENGINE-2)
447AL.
(4) Install the access panels on the wings and belly fairing:
(a) For the left wing and belly fairing:

(b) For the right wing and belly fairing:

(5) Install these access panels on the pylon:
(a) FOR [1000EM1] (ENGINE-1)
413DT 471AR

471AL (Ref. AMM TASK 54-53-11-400-002)

(b) FOR [1000EM2] (ENGINE-2)
423DT 481AL

481AR (Ref. AMM TASK 54-53-11-400-002).

(6) Install the access panel 191DB.
(7) Remove the WARNING NOTICE(S).
(8) Remove the access platform(s).

Subtask 36-11-00-862-071-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 01:06:49 UTC