CrossBleed Valve Failed

TASK 36-11-00-810-991-A
CrossBleed Valve Failed

1. Possible Causes

CROSSBLEED VALVE [6HV]
BMC-1 [1HA1]
BMC-2 [1HA2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-11-00-740-802	BITE Test of the Engine Bleed Air System (EBAS) (System Test)
AMM 36-11-00-740-803	Bite Test of the BMC
AMM 36-11-34-000-001	Removal of the BMC
AMM 36-11-34-400-001	Installation of the BMC
AMM 36-12-52-000-001	Removal of the Crossbleed Valve
AMM 36-12-52-400-001	Installation of the Crossbleed Valve

3. Fault Confirmation
Subtask 36-11-00-740-092-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the EBAS AMM 36-11-00-740-802.

4. Fault Isolation
Subtask 36-11-00-810-378-A ** ON A/C NOT FOR ALL

A. If the fault is identified by the fault message XBLEED VALVE (6HV)/CKT:
(1) Replace the CROSSBLEED VALVE [6HV] AMM 36-12-52-000-001 and AMM 36-12-52-400-001.
(a) Do the test given in Para. 3.

Subtask 36-11-00-810-387-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Set the XBLEED VALVE SELECTOR SWITCH (3HV) to the CLOSE position:
(a) If the XBLEED VALVE (6HV) closes:
1 Remove the BMC1 AMM 36-11-34-000-001.
(2) Do the test given in Para. 3.

Subtask 36-11-00-810-388-A ** ON A/C NOT FOR ALL

C. If the test is OK:
(1) Replace the BMC-1 [1HA1] AMM 36-11-34-400-001.
(2) If the test is not OK:
(a) Install the BMC1 AMM 36-11-34-400-001.
(b) Remove the BMC2 AMM 36-11-34-000-001.
(c) Do the Bite test of the BMC2 (1HA2) AMM 36-11-00-740-803.

Subtask 36-11-00-810-389-A ** ON A/C NOT FOR ALL

D. If the test is OK:
(1) Replace the BMC-2 [1HA2] AMM 36-11-34-000-001 and AMM 36-11-34-400-001.

[Rev.8 from Aug 2018] 2026.04.04 04:33:54 UTC