Loss of the Output Bus from the CIDS Director 1 to the CFDIU

TASK 31-32-00-810-940-A
Loss of the Output Bus from the CIDS Director 1 to the CFDIU

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 23-73-34-000-001	Removal of the CIDS Director
AMM 23-73-34-400-001	Installation of the CIDS Director
AMM 31-32-00-740-003	Ground Scanning of the CFDIU
ASM 313204
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU

3. Fault Confirmation
Subtask 31-32-00-865-171-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 NAV/CIDS/DIR NORM/1	151RH	M05
** ON A/C NOT FOR ALL
121VU	COM NAV/CIDS/DIR NORM/1	151RH	M06

Subtask 31-32-00-740-311-A

B. Do the ground scanning of the CFDIU AMM 31-32-00-740-003.

4. Fault Isolation
Subtask 31-32-00-810-192-A

A. If the test gives the maintenance message:

NO CIDS 1 DATA

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) to the CIDS director 1 (101RH) from pins AA/3F, 3G to pins AA/11A, 11B ASM 313204.

Subtask 31-32-00-740-312-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:29:59 UTC