DOC AIRBUS | TSM A320FLoss of the DC Supply of the ADIRU1
TASK 34-14-00-810-899-A
Loss of the DC Supply of the ADIRU1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-14-00-740-209-A 4. Fault Isolation
Subtask 34-14-00-810-153-A
[Rev.8 from Aug 2018]
2026.04.04 04:32:49 UTC
Loss of the DC Supply of the ADIRU1
1. Possible Causes
- ADIRU-1 [1FP1]
- aircraft wiring
wiring between the ADIRU1 and the circuit breaker (6FP1)
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 341101 | |
| AMM 34-12-34-000-001 | Removal of the ADIRU |
| AMM 34-12-34-400-001 | Installation of the ADIRU |
| AMM 34-14-00-740-004 | SYSTEM TEST of the Inertial Reference (IR) |
Subtask 34-14-00-740-209-A 4. Fault Isolation
Subtask 34-14-00-810-153-A
A. If the test gives the maintenance message ADIRU1 (1FP1) DC SUPPLY:
Subtask 34-14-00-740-210-A - remove the ADIRU-1 [1FP1] AMM 34-12-34-000-001
- do a check for a ground signal at pin AC/8 of the rack connector.
- repair the aircraft wiring between ADIRU1 pin AC/8 and the first terminal block ASM 341101
- install the ADIRU1 AMM 34-12-34-400-001.
- do a check for 28VDC at pin AC/7 of the rack connector.
- install a new ADIRU1.
- do a check and repair the
wiring between the ADIRU1 and the circuit breaker (6FP1) - install the ADIRU1.
B. Do the test given in Para. 3.