Air Leak in the Left Wing with the APU in Operation

TASK 36-22-00-810-851-A
Air Leak in the Left Wing with the APU in Operation

1. Possible Causes

ducts
seals

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 21-52-00-200-010	Hot-Air Leak-Check in the Air Conditioning Bay
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 31-60-00-860-001	EIS Start Procedure
AMM 31-60-00-860-002	EIS Stop Procedure
AMM 36-22-00-790-802	Leak Check on all the Bleed Air Ducts and Packs Components
AMM 49-00-00-860-008	APU Start by External Power
AMM 49-00-00-860-009	APU Shutdown by External Power (131-9(A))

3. Fault Confirmation
Subtask 36-22-00-860-056-A ** ON A/C NOT FOR ALL

A. Job Set-up
(1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.

Subtask 36-22-00-710-095-C ** ON A/C NOT FOR ALL

B. Test
(1) Start the APU AMM 49-00-00-860-008.
(2) On AIR COND panel 30VU:
(a) Push the APU BLEED pushbutton switch (5HV) (the ON legend comes on).

4. Fault Isolation
Subtask 36-22-00-810-113-A ** ON A/C NOT FOR ALL

A. On the upper ECAM DU, if the AIR L WING LEAK warning comes into view:
(1) Do a leak test on the bleed air ducts AMM 36-22-00-790-802.
(a) If there are leaks:

Replace the defective ducts or seals as necessary.

(b) If there are no leaks:

Do a hot-air leak check in the air conditioning bay AMM 21-52-00-200-010.

(2) Do a visual inspection of the ducts.
(a) If there are cracks or damage on the ducts:

Replace the defective ducts .

(b) If there are defects in the seals:

Replace the defective seals .

5. Close-up
Subtask 36-22-00-860-057-C ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Put the aircraft back to its initial configuration.
(2) On AIR COND panel 30VU:
(a) Release the APU BLEED pushbutton switch (5HV) (the ON legend goes off).
(3) Stop the APU AMM 49-00-00-860-009.
(4) Do the EIS stop procedure (Upper ECAM DU and lower ECAM DU only) AMM 31-60-00-860-002.
(5) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:40:29 UTC