DOC AIRBUS | TSM A320FLoss of the Power Supply for the TAT Sensor
TASK 30-31-00-810-811-A
Loss of the Power Supply for the TAT Sensor
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 30-31-00-710-070-A 4. Fault Isolation
Subtask 30-31-00-865-052-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:35 UTC
Loss of the Power Supply for the TAT Sensor
1. Possible Causes
- PHC-1 [6DA1]
wiring between the PHC 1 pin A/S and the ground terminal wiring between the PHC 1 pin A/B and the circuit breaker (1DA1) - C/B-ANTI ICE/PROBES/1/TAT [1DA1]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 24-00-00-810-803-A | Circuit Breaker Tripped and/or C/B TRIPPED Warning |
| AMM 30-31-00-710-001 | Operational Test of the Probe Ice Protection |
| ASM 303101 | |
| AMM 30-31-34-000-002 | Removal of the Probe Heat Computer (PHC) |
| AMM 30-31-34-400-002 | Installation of the Probe Heat Computer (PHC) |
Subtask 30-31-00-710-070-A 4. Fault Isolation
Subtask 30-31-00-865-052-A
A. Table of the circuit breakers used in this procedure:
Subtask 30-31-00-810-060-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 122VU | ANTI ICE/PROBES/1/TAT | 1DA1 | Z12 |
B. If the test gives the maintenance message CHECK TAT PHC1 SUPPLY:
Subtask 30-31-00-710-071-A - do a check of the status of the circuit breaker (1DA1).
- do a check for 115VAC at pin A/B of the PHC 1 (6DA1).
- replace the PHC-1 [6DA1] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
- do a check for a ground signal at pin A/S of the PHC 1 (6DA1).
- repair the
wiring between the PHC 1 pin A/S and the ground terminal ASM 303101.
- do a check of the
wiring between the PHC 1 pin A/B and the circuit breaker (1DA1) .
- repair the above wiring.
- replace the circuit breaker (1DA1).
- Do the procedure (Ref. TSM TASK 24-00-00-810-803).
- Replace the C/B-ANTI ICE/PROBES/1/TAT [1DA1] .
- Replace the PHC-1 [6DA1] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
C. Do the operational test given in Para. 3.