Loss of the LGCIU1 BUS2 for the SEC3

TASK 27-94-00-810-888-A
Loss of the LGCIU1 BUS2 for the SEC3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 279255
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-94-00-740-144-A

A. Test
(1) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-94-00-810-125-A

A. If the BITE test gives the maintenance message:
LGCIU1 OR BUS2 TO SEC3

(1) If the fault continues:

do a check and repair the wiring from the LGCIU1 (5GA1) to the SEC3 (1CE3) ASM 279255.

Subtask 27-94-00-740-145-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:28:19 UTC