DOC AIRBUS | TSM A320FLoss of the Input Discrete (ENG 1/ENG 2) (PHC 3)
TASK 30-31-00-810-837-A
Loss of the Input Discrete (ENG 1/ENG 2) (PHC 3)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 30-31-00-710-122-A 4. Fault Isolation
Subtask 30-31-00-810-086-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:37 UTC
Loss of the Input Discrete (ENG 1/ENG 2) (PHC 3)
1. Possible Causes
- PHC-3 [6DA3]
RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1) RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2) - wiring
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) |
Subtask 30-31-00-710-122-A 4. Fault Isolation
Subtask 30-31-00-810-086-A
A. If the test gives the maintenance message CHECK EIU - PHC 3 INTERFACE:
1 Do a check and repair the wiring :
Subtask 30-31-00-710-123-A - do a check for ground at pin A/<F and/or pin A/<G of the PHC 3 (6DA3).
- replace the PHC-3 [6DA3] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
- replace the
RELAY-OIL LOW PRESS AND GROUND, ENG1 (12KS1) .
- replace the
RELAY-OIL LOW PRESS AND GROUND, ENG2 (12KS2) .
1 Do a check and repair the wiring :
- from the PHC 3 (6DA3) pin A/<F to the relay (12KS1) pin A/2
- from the relay (12KS1) pin A/A to ground
- from the PHC 3 (6DA3) pin A/<G to the relay (12KS2) pin A/2 and
- from the relay (12KS2) pin A/A to ground
B. Do the operational test given in Para. 3.