Loss of the BSCU BUS 4 Output Detected by the SDAC2

TASK 32-42-00-810-865-A
Loss of the BSCU BUS 4 Output Detected by the SDAC2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-002	Operational Test of the Flight Warning Computer (FWC)
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)
ASM 324601

3. Fault Confirmation
Subtask 32-42-00-710-064-A

A. Test
(1) Do the operational test of the Flight Warning Computer AMM 31-50-00-710-002.

4. Fault Isolation
Subtask 32-42-00-810-120-A

A. If the test gives the maintenance message SDAC2 NO : DATA FROM BSCU2:

(1) If the fault continues:

do a check and repair the wiring from the BSCU pins AA/8E, 8F to the first terminal block ASM 324601.

Subtask 32-42-00-710-065-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:31:35 UTC