Loss of the Bus Output from the BCL 1 to the CFDIU

TASK 31-32-00-810-810-A
Loss of the Bus Output from the BCL 1 to the CFDIU

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 31-32-00-869-002	Procedure for the Class 3 Fault Reading
ASM 313206
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU

3. Fault Confirmation
Subtask 31-32-00-865-057-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 31-32-00-740-066-A

B. Test
On the CFDS MENU page, get access to the AVIONICS STATUS page AMM 31-32-00-869-002.

4. Fault Isolation
Subtask 31-32-00-810-058-A

A. If the test gives the maintenance message NO BCL 1 DATA:

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) to the BCL1 (1PB1) from pins AA/7H, 7J to pins A/T, U , ASM 313206.

Subtask 31-32-00-740-067-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:29:48 UTC