DOC AIRBUS | TSM A320FLoss of the Pitot Probe Output-Discrete from the PHC 3
TASK 30-31-00-810-851-A
Loss of the Pitot Probe Output-Discrete from the PHC 3
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 30-31-00-710-150-A 4. Fault Isolation
Subtask 30-31-00-810-100-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:38 UTC
Loss of the Pitot Probe Output-Discrete from the PHC 3
1. Possible Causes
- PHC-3 [6DA3]
wiring from the PHC 3 (6DA3) to the ADIRU 3 (1FP3)
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 30-31-00-710-001 | Operational Test of the Probe Ice Protection |
| ASM 303103 | |
| 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 30-31-00-710-150-A 4. Fault Isolation
Subtask 30-31-00-810-100-A
A. If the test confirms the fault:
Subtask 30-31-00-710-151-A - Do a check for ground at pin A/<B of the PHC 3 (6DA3) ASM 303103.
- Replace PHC-3 [6DA3] , AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
- Do a check and repair the
wiring from the PHC 3 (6DA3) to the ADIRU 3 (1FP3) pin A/<B to pin AA/4J ASM 341302.
- Do the INTERFACE TEST of the ADR (system 3) AMM 34-13-00-740-002
- Do the necessary corrective actions: (TSM chapter 34).
B. Do the operational test given in Para. 3.