Loss of the Angle-of-Attack Sensor Output-Discrete from the PHC 3

TASK 30-31-00-810-852-A
Loss of the Angle-of-Attack Sensor Output-Discrete from the PHC 3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 34-11-00-810-831-A	Loss of the Angle of Attack Sensor 3
TSM TASK 34-13-00-810-908-A	Loss of the AOA 3 Input to the ADR 3
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)
AMM 34-13-00-740-002	INTERFACE TEST of the ADR
ASM 341302

3. Fault Confirmation
Subtask 30-31-00-710-152-A

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

4. Fault Isolation
Subtask 30-31-00-810-101-A

A. If the test gives the maintenance message:
CHECK ADIRU3 AOA PHC3 INTERFACE:

(1) If there is no ground:

(a) If the fault continues:

do a check and repair the wiring from the PHC 3 (6DA3) to the ADIRU 3 (1FP3) pin A/Z to pin AA/3J ASM 341302.

(b) If the fault continues:

do the INTERFACE TEST of the ADR (system 3) AMM 34-13-00-740-002
do the necessary corrective actions: (Ref. TSM TASK 34-11-00-810-831) and (Ref. TSM TASK 34-13-00-810-908).

Subtask 30-31-00-710-153-A

B. Do the test given in Para. 3.

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