DOC AIRBUS | TSM A320FLoss of the Pitot Probe Output-Discrete from the PHC 1
TASK 30-31-00-810-841-A
Loss of the Pitot Probe Output-Discrete from the PHC 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 30-31-00-710-130-A 4. Fault Isolation
Subtask 30-31-00-810-090-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:37 UTC
Loss of the Pitot Probe Output-Discrete from the PHC 1
1. Possible Causes
- PHC-1 [6DA1]
wiring from the PHC 1 (6DA1) to the ADIRU 1 (1FP1)
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| 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) |
| AMM 34-13-00-740-002 | INTERFACE TEST of the ADR |
| ASM 341302 |
Subtask 30-31-00-710-130-A 4. Fault Isolation
Subtask 30-31-00-810-090-A
A. If the test confirms the fault:
Subtask 30-31-00-710-131-A - Do a check for ground at pin A/<B of the PHC 1 (6DA1) ASM 303101.
- Replace PHC-1 [6DA1] , AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
- Do a check and repair the
wiring from the PHC 1 (6DA1) to the ADIRU 1 (1FP1) pin A/<B to pin AA/4J ASM 341302.
- Do the INTERFACE TEST of the ADR (system 1) AMM 34-13-00-740-002
- Do the necessary corrective actions (TSM chapter 34).
B. Do the operational test given in Para. 3.