Loss of the LGCIU 1 Discrete on the DMC 3

TASK 31-63-81-810-904-A
Loss of the LGCIU 1 Discrete on the DMC 3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-740-007	GROUND SCANNING Test of the DMC
ASM 316200
AMM 31-63-34-000-001	Removal of the DMC
AMM 31-63-34-400-001	Installation of the DMC

3. Fault Confirmation
Subtask 31-63-81-740-254-A ** ON A/C NOT FOR ALL

A. Test
Do the Ground Scanning Test of the DMC AMM 31-60-00-740-007.

4. Fault Isolation
Subtask 31-63-81-810-172-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message LGCIU1 FLIGHT DISCRETE (5GA1)/ DMC3(1WT3):

(1) if the fault continues:

check the wiring from DMC3 (1WT3) pins AD/7J, 7K to the first terminal block ASM 316200

Subtask 31-63-81-740-255-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:31:03 UTC