DOC AIRBUS | TSM A320FFailure of the Clock
TASK 31-21-00-810-801-A
Failure of the Clock
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 31-21-00-865-050-A
Subtask 31-21-00-810-050-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:47 UTC
Failure of the Clock
1. Possible Causes
- CLOCK [2FS]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-21-21-000-001 | Removal of the Clock |
| AMM 31-21-21-400-001 | Installation of the Clock |
| AMM 31-32-00-740-003 | Ground Scanning of the CFDIU |
Subtask 31-21-00-865-050-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 31-21-00-740-050-A 4. Fault Isolation| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | CLOCK/NORM/SPLY | 6FS | F11 |
| 121VU | CLOCK/STBY/SPLY | 4FS | N02 |
Subtask 31-21-00-810-050-A
A. If the test gives the maintenance message CLOCK:
Subtask 31-21-00-740-051-A - replace the CLOCK [2FS] , AMM 31-21-21-000-001 and AMM 31-21-21-400-001.
B. Do the test given in Para. 3.B.