Loss of the L/DMC Bus and R/DMC Bus Inputs detected by the FWC1

TASK 31-53-00-810-975-A
Loss of the L/DMC Bus and R/DMC Bus Inputs detected by the FWC1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
ASM 316103

3. Fault Confirmation
Subtask 31-53-00-710-326-A

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

4. Fault Isolation
Subtask 31-53-00-810-230-A

A. If the test gives the maintenance messages FWC1 :NO DATA FROM DMC1 OR 3 and FWC1 :NO DATA FROM DMC2 OR 3:

do a check and repair the wiring from the FWC 1 (1WW1) pins AB/5G, 5H and AE/5C, 5D to the first terminal block, ASM 316103.

Subtask 31-53-00-710-327-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:23 UTC