DOC AIRBUS | TSM A320FLoss of the IR1 BUS1 Output
TASK 34-14-00-810-902-A
Loss of the IR1 BUS1 Output
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-14-00-740-215-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-14-00-810-156-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:32:49 UTC
Loss of the IR1 BUS1 Output
1. Possible Causes
- ADIRU-1 [1FP1]
wiring of the INERTIAL REFERENCE OUTPUT BUS 1 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 |
| AMM 34-14-00-740-001 | Interface Test of the IR |
| ASM 341401 |
Subtask 34-14-00-740-215-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-14-00-810-156-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADIRU1 (1FP1) IR BUS1:
Subtask 34-14-00-740-216-A ** ON A/C NOT FOR ALL - 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 INERTIAL REFERENCE OUTPUT BUS 1 bus from the ADIRU 1 (1FP1) to the first terminal block ASM 341401.
B. Do the test given in Para. 3.