DOC AIRBUS | TSM A320FFailure of the Pitot Probes (PHC 1 and PHC 2)
TASK 30-31-00-810-865-A
Failure of the Pitot Probes (PHC 1 and PHC 2)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 30-31-00-710-171-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 30-31-00-810-117-B ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:29:39 UTC
Failure of the Pitot Probes (PHC 1 and PHC 2)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 30-31-00-710-001 | Operational Test of the Probe Ice Protection |
| ASM 303101 | |
| ASM 303102 | |
| 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 34-11-15-000-001 | Removal of the Pitot Probe |
| AMM 34-11-15-400-001 | Installation of the Pitot Probe |
Subtask 30-31-00-710-171-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 30-31-00-810-117-B ** ON A/C NOT FOR ALL
A. If the ECAM warning ANTI ICE CAPT+F/O PITOT comes into view and the test gives the maintenance messages PITOT PROBE 9DA1 and PITOT PROBE 9DA2:
(a) Replace the PROBE-PITOT, 1 [9DA1] and/or the PROBE-PITOT, 2 [9DA2] AMM 34-11-15-000-001 and AMM 34-11-15-400-001.
(2) If the resistance is between 32.3 ohms and 35.7 ohms:
(a) Replace the PHC-1 [6DA1] and/or the PHC-2 [6DA2] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
(b) If the fault continues:
Subtask 30-31-00-810-117-E ** ON A/C NOT FOR ALL - Disconnect the connector from the PITOT PROBE 1 (9DA1) and do a check of the resistance between pins A/B and A/C ASM 303101.
- Disconnect the connector from the PITOT PROBE 2 (9DA2) and do a check of the resistance between pins A/B and A/C ASM 303102.
(a) Replace the PROBE-PITOT, 1 [9DA1] and/or the PROBE-PITOT, 2 [9DA2] AMM 34-11-15-000-001 and AMM 34-11-15-400-001.
(2) If the resistance is between 32.3 ohms and 35.7 ohms:
(a) Replace the PHC-1 [6DA1] and/or the PHC-2 [6DA2] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
(b) If the fault continues:
- Do a check and repair the wiring :
. From pin A/H of the PHC 1 (6DA1) to pin A/B of the PITOT PROBE 1 (9DA1) ASM 303101.
. From pin A/H of the PHC 2 (6DA2) to pin A/B of the PITOT PROBE 2 (9DA2) ASM 303102.
A. If the ECAM warning ANTI ICE CAPT+F/O PITOT comes into view and the test gives the maintenance messages PITOT PROBE 9DA1 and PITOT PROBE 9DA2:
(a) Replace the PROBE-PITOT, 1 [9DA1] and/or the PROBE-PITOT, 2 [9DA2] AMM 34-11-15-000-001 and AMM 34-11-15-400-001.
(2) If the resistance is between 24 ohms and 34 ohms:
(a) Replace the PHC-1 [6DA1] and/or the PHC-2 [6DA2] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
(b) If the fault continues:
Subtask 30-31-00-710-172-A ** ON A/C NOT FOR ALL - Disconnect the connector from the PITOT PROBE 1 (9DA1) and do a check of the resistance between pins A/B and A/C ASM 303101.
- Disconnect the connector from the PITOT PROBE 2 (9DA2) and do a check of the resistance between pins A/B and A/C ASM 303102.
(a) Replace the PROBE-PITOT, 1 [9DA1] and/or the PROBE-PITOT, 2 [9DA2] AMM 34-11-15-000-001 and AMM 34-11-15-400-001.
(2) If the resistance is between 24 ohms and 34 ohms:
(a) Replace the PHC-1 [6DA1] and/or the PHC-2 [6DA2] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
(b) If the fault continues:
- Do a check and repair the wiring :
. From pin A/H of the PHC 1 (6DA1) to pin A/B of the PITOT PROBE 1 (9DA1) ASM 303101.
. From pin A/H of the PHC 2 (6DA2) to pin A/B of the PITOT PROBE 2 (9DA2) ASM 303102.
B. Do the test given in Para. 3.