DOC AIRBUS | TSM A320FLoss of the Input Discrete (ENG 1/ENG 2) (PHC 2)
TASK 30-31-00-810-836-A
Loss of the Input Discrete (ENG 1/ENG 2) (PHC 2)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 30-31-00-710-120-A 4. Fault Isolation
Subtask 30-31-00-810-085-A
[Rev.8 from Aug 2018]
2026.04.04 04:29:37 UTC
Loss of the Input Discrete (ENG 1/ENG 2) (PHC 2)
1. Possible Causes
- PHC-2 [6DA2]
- RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1]
- RELAY-OIL LOW PRESS AND GROUND, ENG 2 [10KS2]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 30-31-00-710-001 | Operational Test of the Probe Ice Protection |
| 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) |
Subtask 30-31-00-710-120-A 4. Fault Isolation
Subtask 30-31-00-810-085-A
A. If the test gives the maintenance message CHECK EIU - PHC 2 INTERFACE:
1 Do a check and repair the wiring :
Subtask 30-31-00-710-121-A - do a check for ground at pin A/<F and/or pin A/<G of the PHC 2 (6DA2).
- replace the PHC-2 [6DA2] AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
- replace the RELAY-OIL LOW PRESS AND GROUND, ENG 1 [10KS1] .
- replace the RELAY-OIL LOW PRESS AND GROUND, ENG 2 [10KS2] .
1 Do a check and repair the wiring :
- from the PHC 2 (6DA2) pin A/<F to the relay (10KS1) pin A/6
- from the relay (10KS1) pin A/C to ground
- from the PHC 2 (6DA2) pin A/<G to the relay (10KS2) pin A/6 and
- from the relay (10KS2) pin A/C to ground
B. Do the operational test given in Para. 3.