Loss of the BCL 1 Bus of the SDAC 2

TASK 31-54-00-810-852-A
Loss of the BCL 1 Bus of the SDAC 2

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 31-54-00-865-091-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/BCL1	9PB1	F01
105VU	ELEC/BAT BUS/REF/BCL1	8PB1	G01

Subtask 31-54-00-710-140-A

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

4. Fault Isolation
Subtask 31-54-00-810-101-A

A. If the test gives the maintenance message SDAC2 : NO DATA FROM BCL1

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the SDAC 2 (1WV2) to the BCL 1 (1PB1) from pins AB/11G, 11H to pins A/<D, <E ASM 315403.

Subtask 31-54-00-710-141-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:27 UTC