DOC AIRBUS | TSM A320FLoss of the IR 3 BUS4 Output
TASK 34-14-00-810-989-A
Loss of the IR 3 BUS4 Output
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-14-00-740-373-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-14-00-810-248-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:32:54 UTC
Loss of the IR 3 BUS4 Output
1. Possible Causes
- ADIRU-3 [1FP3]
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 |
| AMM 34-14-00-740-001 | Interface Test of the IR |
Subtask 34-14-00-740-373-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-14-00-810-248-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADIRU3 (1FP3) IR BUS4:
Subtask 34-14-00-740-374-A ** ON A/C NOT FOR ALL - replace the ADIRU-3 [1FP3] AMM 34-12-34-000-001 and AMM 34-12-34-400-001.
B. Do the test given in Para. 3.