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

TASK 73-29-00-810-826-A
Loss of the Output 1 Bus of the ECU 1 Channel B

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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
AMM 73-25-34-710-040	Operational Test of the Engine Interface Unit
AMM 73-25-34-710-043	Operational Test of the Engine Interface Unit

3. Fault Confirmation
Subtask 73-29-00-710-076-A ** ON A/C NOT FOR ALL

A. Do the operational test of the Engine Interface Unit AMM 73-25-34-710-040.

Subtask 73-29-00-710-076-B ** ON A/C NOT FOR ALL

A. Do the operational test of the Engine Interface Unit AMM 73-25-34-710-043.

4. Fault Isolation
Subtask 73-29-00-810-082-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message EIU1 : NO FADEC 1B DATA:

(1) If the fault continues:

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

Subtask 73-29-00-710-077-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:35:54 UTC