DOC AIRBUS | TSM A320FLoss of the IR1 Bus 3 Output Identified by the TCAS
TASK 34-14-00-810-868-A
Loss of the IR1 Bus 3 Output Identified by the TCAS
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-14-00-740-175-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-14-00-810-126-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:32:47 UTC
Loss of the IR1 Bus 3 Output Identified by the TCAS
1. Possible Causes
- ADIRU-1 [1FP1]
wiring of the INERTIAL REFERENCE OUTPUT BUS 3 bus from the ADIRU1 (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 341401 | |
| AMM 34-43-00-740-001 | BITE Test of the TCAS |
Subtask 34-14-00-740-175-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 34-14-00-810-126-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADIRU1 (1FP1)/TCAS (1SG):
Subtask 34-14-00-740-176-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 3 bus from the ADIRU1 (1FP1) to the first terminal block ASM 341401.
B. Do the test given in Para. 3.