Loss of the BSCU Bus 3 of the SDAC 1

TASK 31-54-00-810-897-A
Loss of the BSCU Bus 3 of the SDAC 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
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
AMM 32-42-34-000-001	Removal of the Braking/Steering Control Unit (BSCU)
AMM 32-42-34-400-001	Installation of the Braking/Steering Control Unit (BSCU)

3. Fault Confirmation
Subtask 31-54-00-710-230-A

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

4. Fault Isolation
Subtask 31-54-00-810-146-A

A. If the test gives the maintenance message SDAC1 : NO DATA FROM BSCU2:

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the SDAC 1 (1WV1) pins AE/14C, 14D to the BSCU (10GG) pins AA/7E, 7F ASM 315403

Subtask 31-54-00-710-231-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:29 UTC