Loss of the PHC 1 (Class 3 Faults)

TASK 30-31-00-810-838-A
Loss of the PHC 1 (Class 3 Faults)

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)

3. Fault Confirmation
Subtask 30-31-00-710-124-A

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

4. Fault Isolation
Subtask 30-31-00-810-087-A

A. If the test gives the maintenance message PHC 6DA1:

[Rev.8 from Aug 2018] 2026.04.04 04:29:37 UTC