Loss of the BCL 2 Bus of the SDAC 1

TASK 31-54-00-810-849-A
Loss of the BCL 2 Bus of the SDAC 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-38-34-000-001	Removal of the Battery Charge Limiter (BCL)
AMM 24-38-34-400-001	Installation of the Battery Charge Limiter (BCL)
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 31-54-00-865-088-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
105VU	ELEC/BAT REF/BCL2	9PB2	F02
105VU	ELEC/BAT BUS/REF/BCL2	8PB2	J02

Subtask 31-54-00-710-134-A

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

4. Fault Isolation
Subtask 31-54-00-810-098-A

A. If the test gives the maintenance message SDAC1 : NO DATA FROM BCL2

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the SDAC 1 (1WV1) to the BCL 2 (1PB2) from pins AE/11C, 11D to pins A/P, R ASM 315403.

Subtask 31-54-00-710-135-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:26 UTC