Loss of the TAT Sensor Output-Discrete from the PHC 1 to the ADIRU 3

TASK 30-31-00-810-855-A
Loss of the TAT Sensor Output-Discrete from the PHC 1 to the ADIRU 3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 34-13-00-810-911-A	Loss of the TAT Sensor 1 Input on the ADR3
AMM 30-31-00-710-001	Operational Test of the Probe Ice Protection
ASM 303101
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 34-13-00-740-002	INTERFACE TEST of the ADR
ASM 341302

3. Fault Confirmation
Subtask 30-31-00-710-158-A

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

4. Fault Isolation
Subtask 30-31-00-810-104-A

A. If the test gives the maintenance message CHECK ADIRU3 TAT PHC1 INTERFACE:

(1) If there is no ground:

(a) If the fault continues:

do a check and repair the wiring from the PHC 1 (6DA1) to the ADIRU 3 (1FP3) pin A/<A to pin AA/4F ASM 341302.

(b) If the fault continues:

Subtask 30-31-00-710-159-A

B. Do the operational test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:29:38 UTC