DOC AIRBUS | TSM A320FLoss of the ADR 1 BUS 4 Output Identified by the GPWC
TASK 34-13-00-810-839-A
Loss of the ADR 1 BUS 4 Output Identified by the GPWC
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-13-00-740-093-B 4. Fault Isolation
Subtask 34-13-00-810-088-A
[Rev.8 from Aug 2018]
2026.04.04 04:32:24 UTC
Loss of the ADR 1 BUS 4 Output Identified by the GPWC
1. Possible Causes
- ADIRU-1 [1FP1]
wiring of the ADR OUTPUT BUS 4 bus from the ADIRU 1 (1FP1) to the first terminal block
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 34-12-34-000-001 | Removal of the ADIRU |
| AMM 34-12-34-400-001 | Installation of the ADIRU |
| ASM 341301 | |
| AMM 34-48-00-740-002 | BITE Test of the GPWS |
Subtask 34-13-00-740-093-B 4. Fault Isolation
Subtask 34-13-00-810-088-A
A. If the test gives the maintenance message ADIRU1(1FP1)/GPWC(1WZ):
Subtask 34-13-00-740-094-A - replace the ADIRU-1 [1FP1] , AMM 34-12-34-000-001 and AMM 34-12-34-400-001.
- do a check and repair the
wiring of the ADR OUTPUT BUS 4 bus from the ADIRU 1 (1FP1) to the first terminal block , ASM 341301.
B. Do the test given in Para. 3.A.