DOC AIRBUS | TSM A320FLoss of the FCU 1 Channel A Output Bus by DMC 2
TASK 31-63-81-810-931-A
Loss of the FCU 1 Channel A Output Bus by DMC 2
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 31-63-81-740-306-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 31-63-81-810-213-A ** ON A/C NOT FOR ALL
Subtask 31-63-81-740-307-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:31:06 UTC
Loss of the FCU 1 Channel A Output Bus by DMC 2
1. Possible Causes
- DMC-2 [1WT2]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-60-00-740-004 | EIS System Test |
| ASM 316201 | |
| AMM 31-63-34-000-001 | Removal of the DMC |
| AMM 31-63-34-400-001 | Installation of the DMC |
Subtask 31-63-81-740-306-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 31-63-81-810-213-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message FCU1(2CA)BUS FCU1A/DMC2(1WT2):
5. Close-up- replace the DMC-2 [1WT2] AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
- do a check and repair the wiring from the DMC 2 (1WT2) pins AA/6A, 6B to the first terminal block ASM 316201.
Subtask 31-63-81-740-307-A ** ON A/C NOT FOR ALL
A. Do the test given in Para. 3.A.