Loss of the Reception of the FWC 2 VALID Discrete by the FMGC 1

TASK 22-83-00-810-854-A
Loss of the Reception of the FWC 2 VALID Discrete by the FMGC 1

1. Possible Causes

FMGC-1 [1CA1]
FWC-2 [1WW2]
wiring of the FWC OPP VALID discrete (from the FMGC 1 (1CA1) to the FWC 2 (1WW2))

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-83-34-000-001	Removal of the FMGC
AMM 22-83-34-400-001	Installation of the FMGC
ASM 228504
AMM 22-91-00-710-001	Ground Scanning of the AFS
AMM 31-53-34-000-001	Removal of the Flight Warning Computer (FWC)
AMM 31-53-34-400-001	Installation of the Flight Warning Computer (FWC)

3. Fault Confirmation
Subtask 22-83-00-865-081-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	EIS/FWC2/SPLY	2WW	Q07

Subtask 22-83-00-710-140-A

B. Test
(1) Do the Ground Scanning of the AFS AMM 22-91-00-710-001.

4. Fault Isolation
Subtask 22-83-00-810-135-A

A. If the test gives the maintenance message AFS: CHK FWC2-FMGC1 CKT:

(1) If the fault continues:

(2) If the fault continues:

do a check and repair the wiring of the FWC OPP VALID discrete (from the FMGC 1 (1CA1) to the FWC 2 (1WW2)) ASM 228504.

Subtask 22-83-00-710-141-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:32 UTC