DOC AIRBUS | TSM A320FLoss of the ILS1 Audio Signal from the ground station
TASK 34-36-00-810-830-A
Loss of the ILS1 Audio Signal from the ground station
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 34-36-00-710-064-B 4. Fault Isolation
Subtask 34-36-00-865-065-A
[Rev.8 from Aug 2018]
2026.04.04 04:32:59 UTC
Loss of the ILS1 Audio Signal from the ground station
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 23-51-34-000-001 | Removal of the Audio Management Unit (AMU) (1RN) |
| AMM 23-51-34-400-001 | Installation of the Audio Management Unit (AMU) (1RN) |
| AMM 34-36-00-710-003 | Operational Test of the ILS |
| ASM 343601 | |
| AMM 34-36-31-000-001 | Removal of the ILS Receiver |
| AMM 34-36-31-400-001 | Installation of the ILS Receiver |
Subtask 34-36-00-710-064-B 4. Fault Isolation
Subtask 34-36-00-865-065-A
A. Table of the circuit breakers used in this procedure:
Subtask 34-36-00-810-083-B | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/MMR/2 | 42RT2 | K09 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/ILS/2 | 1RT2 | K09 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/MMR/2 | 42RT2 | L07 |
B. If there is no identification signal on the loud speakers with the circuit breaker 42RT2 open:
Subtask 34-36-00-710-065-A - replace the MMR-1 [40RT1] AMM 34-36-31-000-001 and AMM 34-36-31-400-001.
- replace the AMU [1RN] AMM 23-51-34-000-001 and AMM 23-51-34-400-001.
- do a check and repair the
wiring of the AUDIO OUTPUT bus from the MMR-1 (40RT1) to the AMU (1RN) ASM 343601.
C. Do the test given in Para. 3.