Loss of the PHC 1

TASK 30-31-00-810-801-A
Loss of the PHC 1

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
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 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU

3. Fault Confirmation
Subtask 30-31-00-710-050-A

A. Test
(1) Do the operational test of the probe ice protection AMM 30-31-00-710-001.

4. Fault Isolation
Subtask 30-31-00-810-050-A

A. If the test gives maintenance message PHC 6DA1:
(1) Replace PHC-1 [6DA1] , AMM 30-31-34-000-002 and AMM 30-31-34-400-002.
(a) If the fault continues:

[Rev.8 from Aug 2018] 2026.04.04 04:29:34 UTC