Internal Failure of the ECU on Engine 1

TASK 73-20-81-810-908-A
Internal Failure of the ECU on Engine 1

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)
AMM 73-29-00-710-040	Operational Test of the FADEC on the ground (with Engine Motoring)

3. Fault Confirmation
Subtask 73-20-81-710-156-A ** ON A/C NOT FOR ALL

A. Do the operational test of the FADEC 1B on the ground (with engine non motoring) AMM 73-29-00-710-040.

4. Fault Isolation
Subtask 73-20-81-810-156-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ECU (CCDL):

[Rev.8 from Aug 2018] 2026.04.04 04:35:41 UTC