Loss of the GCU 1/EGIU 1 Bus of the SDAC 1

TASK 31-54-00-810-901-A
Loss of the GCU 1/EGIU 1 Bus of the SDAC 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-22-33-000-001	Removal of the EGIU-1(2)
AMM 24-22-33-400-002	Installation of the EGIU-1(2)
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
ASM 315403
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 31-54-00-710-238-A ** ON A/C NOT FOR ALL

A. Test
Do the ground scanning of the central warning systems AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 31-54-00-810-150-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message SDAC1 : NO DATA FROM EGIU1-1:

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring from the SDAC 1 (1WV1) to the EGIU 1 (22XU1) from pins AB/10G, 10H to pins AA/1A, 1B ASM 315403.

Subtask 31-54-00-710-239-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:30 UTC