Loss of the FCU 1 Output Buses by the DMC 1

TASK 31-63-00-810-994-A
Loss of the FCU 1 Output Buses by the DMC 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 31-63-00-810-905-A	Loss of the FCU 1 Channel A Output Bus by the DMC 1
TSM TASK 31-63-00-810-906-A	Loss of the FCU 1 Channel B Output Bus by the DMC 1
AMM 22-81-12-000-001	Removal of the FCU
AMM 22-81-12-400-001	Installation of the FCU
AMM 31-60-00-740-007	GROUND SCANNING Test of the DMC

3. Fault Confirmation
Subtask 31-63-00-740-388-A ** ON A/C NOT FOR ALL

A. Test
Do the Ground Scanning Test of the DMC AMM 31-60-00-740-007.

4. Fault Isolation
Subtask 31-63-00-810-247-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message FCU1(2CA)/DMC1(1WT1):

Do the fault isolation (Para. 4. A.) of the procedures (Ref. TSM TASK 31-63-00-810-905) and (Ref. TSM TASK 31-63-00-810-906)

(1) If the fault continues:

Subtask 31-63-00-740-389-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:30:52 UTC