Incorrect Air Bleed Generation

TASK 36-00-00-810-804-A
Incorrect Air Bleed Generation

1. Possible Causes

wiring
BMC-1 [1HA1]
BMC-2 [1HA2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-32-00-860-011	Procedure to Get Access to the SYSTEM REPORT/TEST/PNEU Page
ASM 315403
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC

3. Fault Confirmation
Subtask 36-00-00-865-051-A ** ON A/C NOT FOR ALL

A. Table of the circuit breakers used in this procedure:

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
49VU	FWS/FWC1/SPLY	3WW	F01
121VU	EIS/FWC2/SPLY	2WW	Q07
122VU	AIR BLEED/ENG 1/MONG	3HA1	Z23
122VU	AIR BLEED/ENG 2/CTL	2HA2	Z22

Subtask 36-00-00-710-052-A ** ON A/C NOT FOR ALL

B. Test
(1) Not Applicable

4. Fault Isolation
Subtask 36-00-00-810-052-A ** ON A/C NOT FOR ALL

A. If the AIR BLEED ECAM message is shown without a maintenance message in the PFR:

Do a check for a class II fault in the BMC Ground Report:

(1) If a class II fault is shown in the BMC Ground Report, associated with the AIR BLEED ECAM message and not with other E/Ws, do the related trouble shooting procedure.
(2) If no class II fault is shown in the BMC Ground Report, you can ignore the AIR BLEED message and continue this procedure to remove it:

Open the circuit breakers EIS/FWC2/SPLY (2WW) and FWS/FWC1/SPLY (3WW) for 5 to 10 seconds to cancel the AIR BLEED status maintenance, then close them.

NOTE: Approximately two minutes are necessary for the full initialization of the FWCs.

NOTE: The reset of BMC1 and/or BMC2 will not cancel the AIR BLEED maintenance status on the ECAM STATUS page. If this maintenance status came into view after a power transfer, it can go out of view after the next engine start and will not come into view again after engine shutdown.

NOTE: The AIR BLEED maintenance status is applicable when it is shown, after engine shutdown, in the post flight report as an ECAM warning with the related CFDS fault message.

NOTE: To erase the AIR BLEED, the only condition is to start the FWC Flight phase 1. After the engine shutdown, the A/C will be in Flight phase 10. Three hundred seconds later, the start of the Flight phase 1 should reset the AIR BLEED.

(3) If the fault continues:
(a) On the MCDU, get the SYSTEM REPORT/TEST PNEU menu page AMM 31-32-00-860-011.
(b) On the MCDU, push the line key adjacent to the BMC1(2) indication.
1 If the BMC1(2) page does not come into view:
a Do a check of the wiring between:

Pin AA/10C of BMC1 (1HA1) and pin AB/12G of SDAC1 (1WV1) ASM 315403.
Pin AA/11C of BMC1 (1HA1) and pin AB/12H of SDAC1 (1WV1) ASM 315403.
Pin AA/10C of BMC1 (1HA1) and pin AE/12C of SDAC1 (1WV1) ASM 315403.
Pin AA/11C of BMC1 (1HA1) and pin AE/12D of SDAC1 (1WV1) ASM 315403.
Pin AA/10C of BMC2 (1HA2) and pin AB/12G of SDAC2 (1WV1) ASM 315403.
Pin AA/11C of BMC2 (1HA2) and pin AB/12H of SDAC2 (1WV1) ASM 315403.
Pin AA/10C of BMC2 (1HA2) and pin AE/12C of SDAC2 (1WV1) ASM 315403.
Pin AA/11C of BMC2 (1HA2) and pin AE/12D of SDAC2 (1WV1) ASM 315403.

2 If the wiring is not correct:

Repair the wiring .

3 If the wiring is correct:

Replace BMC-1 [1HA1] or BMC-2 [1HA2] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

4 If the BMC1(2) page comes into view:

NOTE: The AIR BLEED maintenance status on the ECAM STATUS page is an unwanted message. You can ignore it.

a Open the AIR BLEED/ENG 1/MONG (2HA1), AIR BLEED/ENG 1/CTL (3HA1) circuit breakers, AIR BLEED/ENG 2/MONG (2HA2) and AIR BLEED/ENG 2/CTL (3HA2) circuit breakers during 5 to 10 seconds, then close them.

[Rev.8 from Aug 2018] 2026.04.04 04:33:39 UTC