Failure of the EIU on Engine 1

TASK 73-25-00-810-855-A
Failure of the EIU on Engine 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 73-25-34-000-040	Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-040	Installation of the Engine Interface Unit (EIU)
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 73-25-00-710-158-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) AMM 73-25-34-710-040.

Subtask 73-25-00-710-158-B ** ON A/C NOT FOR ALL

A. Test
(1) Do the operational test of the Engine Interface Unit (EIU) through the Centralized Fault Display System (CFDS) AMM 73-25-34-710-043.

4. Fault Isolation
Subtask 73-25-00-810-104-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message EIU 1:

[Rev.8 from Aug 2018] 2026.04.04 04:35:43 UTC