Spurious APU leak indication on the Engine 1

TASK 36-11-00-810-951-A
Spurious APU leak indication on the Engine 1

1. Possible Causes

BMC-1 [1HA1]
P/BSW-AIR COND/APU BLEED [5HV]
wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-00-740-001	BITE Test of the BMC 1(2)
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC
ASM 361201

3. Fault Confirmation
Subtask 36-11-00-740-056-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the BMC1 AMM 36-11-00-740-001.

4. Fault Isolation
Subtask 36-11-00-810-245-A ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message:
BMC1 OR APU FAULT IND 7HV

replace the BMC-1 [1HA1] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

(1) If the fault continues:

replace the P/BSW-AIR COND/APU BLEED [5HV] ASM 361201.

(a) If the fault continues:

do a check and repair the wiring ASM 361201 between:
. pin A/B1 of the APU bleed pushbutton switch (5HV) and pin AA/14C of the BMC1 (1HA1)
. pin A/B3 and the ground.

Subtask 36-11-00-810-245-D ** ON A/C NOT FOR ALL

A. If the BITE test gives the maintenance message:
BMC1 OR APU FAULT IND 7HV

NOTE: If the maintenance message BMC1 OR APU FAULT IND 7HV comes into view with no associated ECAM warning, no trouble shooting procedure is necessary.

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

(1) If the fault continues:

Replace the P/BSW-AIR COND/APU BLEED [5HV] ASM 361201.

(a) If the fault continues:

Do a check and repair the wiring ASM 361201 between:
. Pin A/B1 of the APU bleed pushbutton switch (5HV) and pin AA/14C of the BMC1 (1HA1)
. Pin A/B3 and the ground.

Subtask 36-11-00-740-057-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:50 UTC