Loss of the FMGC1 Input

TASK 34-48-00-810-807-A
Loss of the FMGC1 Input

1. Possible Causes

GPWC [1WZ]
wiring of the FMGC DATA INPUT bus (AB 10C/10D) from the GPWC (1WZ) to the first terminal block
wiring of the FMGC DATA INPUT bus (AB 12C/12D) from the GPWC (1WZ) to the first terminal block

2. Job Set-up Information
A. Referenced Information

3. Fault Confirmation
Subtask 34-48-00-740-062-C

A. Test
(1) Do the BITE test of the Enhanced GPWS AMM 34-48-00-740-002.

4. Fault Isolation
Subtask 34-48-00-810-057-D

A. If the BITE test gives the maintenance message FMCG1 (1CA1)/GPWC (1WZ):

(1) If the fault continues:

do a check and repair the wiring of the FMGC DATA INPUT bus (AB 10C/10D) from the GPWC (1WZ) to the first terminal block ASM 344801.
do a check and repair the wiring of the FMGC DATA INPUT bus (AB 12C/12D) from the GPWC (1WZ) to the first terminal block ASM 344802.

Subtask 34-48-00-740-063-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:14 UTC