Loss of the Output 1 Bus of the ECU 1 Channel A

TASK 73-29-00-810-821-A
Loss of the Output 1 Bus of the ECU 1 Channel A

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-96-00-710-001	Operational Test of the AFS
AMM 73-21-60-000-001	Removal of the Electronic Control Unit (ECU)
AMM 73-21-60-400-001	Installation of the Electronic Control Unit (ECU)
ASM 732510

3. Fault Confirmation
Subtask 73-29-00-710-070-A ** ON A/C NOT FOR ALL

A. Do the operational test of the AFS AMM 22-96-00-710-001.

4. Fault Isolation
Subtask 73-29-00-810-077-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message AFS : FADEC 1:

(1) If the fault continues:

do a check and repair the aircraft wiring of the output 1 bus on channel A from the ECU (4000KS) to the first terminal block ASM 732510.

Subtask 73-29-00-710-071-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:35:52 UTC