Loss of the CIDS2 Bus of the SDAC 2

TASK 31-54-00-810-968-A
Loss of the CIDS2 Bus of the SDAC 2

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 237302
AWM 237310
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
AMM 31-55-34-000-001	Removal of the SDAC
AMM 31-55-34-400-001	Installation of the SDAC

3. Fault Confirmation
Subtask 31-54-00-865-155-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/CIDS/DIR ESS/2	157RH	G02
** ON A/C NOT FOR ALL
49VU	COM DIR ESS/2	157RH	G02
** ON A/C NOT FOR ALL
121VU	COM/CIDS/DIR 2/BAT	146RH	P14
121VU	COM/CIDS/BAT/CTL	148RH	P12
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DIR NORM/2	156RH	M06
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DIR NORM/2	156RH	M07

Subtask 31-54-00-710-367-A

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

4. Fault Isolation
Subtask 31-54-00-810-218-A

A. If the test gives the maintenance message
SDAC2:NO DATA FROM CIDS2:

(1) If the fault continues:

do a check and repair the wiring from the SDAC 2 (1WV2) pins AB/08G, 08H to the first terminal block, AWM 237310 and ASM 237302.

Subtask 31-54-00-710-368-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:35 UTC