LGCIU2 Invalidated Fault on EIU-1

TASK 73-25-00-810-B55-A
LGCIU2 Invalidated Fault on EIU-1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU
AMM 73-25-34-000-802	Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-802	Installation of the Engine Interface Unit (EIU)

3. Fault Confirmation
Subtask 73-25-00-710-596-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Fault Isolation
Subtask 73-25-00-810-478-A ** ON A/C NOT FOR ALL

A. Do as follows:
(1) Replace LGCIU-2 [5GA2] AMM 32-31-71-000-001 and AMM 32-31-71-400-001.
(a) Do the repair confirmation in Para. 4.B.
(2) If the fault continues:
(a) Replace EIU-1 [1KS1] AMM 73-25-34-000-802 and AMM 73-25-34-400-802.
(b) Do the repair confirmation in Para. 4.B.

Subtask 73-25-00-710-597-A ** ON A/C NOT FOR ALL

B. Repair Confirmation
(1) After the next flight, check on class 3 fault report that the fault is not shown.

5. Close-up
Subtask 73-25-00-860-200-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.

[Rev.8 from Aug 2018] 2026.04.04 04:36:54 UTC