Failure of the CFDIU Detected by the DMC 1

TASK 31-32-00-810-868-A
Failure of the CFDIU Detected by the DMC 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 313202
AMM 31-32-34-000-001	Removal of the CFDIU
AMM 31-32-34-400-001	Installation of the CFDIU
AMM 31-60-00-740-002	Perform Electronic Instrument System (EIS) Input Test
AMM 31-60-00-740-007	GROUND SCANNING Test of the DMC

3. Fault Confirmation
Subtask 31-32-00-865-116-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	EIS/DMC1/SPLY	10WT1	E11
49VU	EIS/DMC1/SWTG	21WT1	E09

Subtask 31-32-00-740-180-A ** ON A/C NOT FOR ALL

B. Test
Do the EIS input test (system 1) AMM 31-60-00-740-002.

Subtask 31-32-00-740-180-B ** ON A/C NOT FOR ALL

B. Test
Do the Ground Scanning Test of the DMC AMM 31-60-00-740-007.

4. Fault Isolation
Subtask 31-32-00-810-117-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DMC1 : NO CFDIU DATA:

(1) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) pins AA/2B, 2C to the first terminal block , ASM 313202.

Subtask 31-32-00-810-117-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message CFDIU(1TW)/DMC1(1WT1)

(1) If the fault continues:

do a check and repair the wiring from the CFDIU (1TW) pins AA/2B, 2C to the first terminal block , ASM 313202.

Subtask 31-32-00-740-181-A

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

[Rev.8 from Aug 2018] 2026.04.04 04:29:53 UTC