Slow Operation of the Crossbleed Valve

TASK 36-12-00-810-811-A
Slow Operation of the Crossbleed Valve

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 36-12-00-710-802	Operational Test of the APU Bleed Air Supply and Crossbleed Systems
AMM 36-12-52-000-001	Removal of the Crossbleed Valve
AMM 36-12-52-000-002	Removal of the Crossbleed Valve Actuator
AMM 36-12-52-400-001	Installation of the Crossbleed Valve
AMM 36-12-52-400-002	Installation of the Crossbleed Valve Actuator

3. Fault Confirmation
Subtask 36-12-00-710-064-A ** ON A/C NOT FOR ALL

A. Do the operational test of the APU bleed-air supply and the crossbleed systems AMM 36-12-00-710-802.

4. Fault Isolation
Subtask 36-12-00-810-067-A ** ON A/C NOT FOR ALL

A. If after the test message X-BLEED MAN CTL is shown on the status page of the lower ECAM display unit:

Look at the visual position indicator of the crossbleed valve to make sure that the indicator shows the fully closed position.
Set the X-BLEED selector switch on AIR COND overhead panel 30VU to the OPEN position.
Do a check of the operation time of the crossbleed valve from the fully closed to the fully open position.

(1) If the operation time of the crossbleed valve is more than 10 seconds:

Replace the CROSSBLEED VALVE ACTUATOR AMM 36-12-52-000-002 and AMM 36-12-52-400-002.

Subtask 36-12-00-810-068-A ** ON A/C NOT FOR ALL

B. If the fault continues:
(1) Replace the CROSSBLEED VALVE [6HV] AMM 36-12-52-000-001 and AMM 36-12-52-400-001.

Subtask 36-12-00-710-065-A ** ON A/C NOT FOR ALL

C. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:00 UTC