Loss of the CIDS1 Bus of the SDAC 2

TASK 31-54-00-810-966-A
Loss of the CIDS1 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 31-54-00-865-153-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	COM/CIDS/DIR ESS/1	150RH	G01
** ON A/C NOT FOR ALL
121VU	COM/CIDS/DIR 1/BAT	147RH	P13
121VU	COM/CIDS/BAT/CTL	148RH	P12
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M05
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M06

Subtask 31-54-00-710-363-A

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

4. Fault Isolation
Subtask 31-54-00-810-216-A

A. If the test gives the maintenance message
SDAC2:NO DATA FROM CIDS1:

(1) If the fault continues:

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

Subtask 31-54-00-710-364-A

B. Do the test given in Para. 3.

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