Loss of the Reception of the ATH OPP ENG Discretes by the FMGC 1

TASK 22-83-00-810-829-A
Loss of the Reception of the ATH OPP ENG Discretes by the FMGC 1

1. Possible Causes

FMGC-1 [1CA1]
wiring of the ATH OPP ENGD COM OPP and ATH OPP ENGD MON OPP discretes (from the FMGC 1 (1CA1) to the first terminal block)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 223101
AMM 22-83-34-000-001	Removal of the FMGC
AMM 22-83-34-400-001	Installation of the FMGC
AMM 22-96-00-710-001	Operational Test of the AFS

3. Fault Confirmation
Subtask 22-83-00-710-094-A

A. Test
(1) On the FCU, make sure that the A/THR pushbutton switch is pushed.
(2) Do the operational test of the AFS AMM 22-96-00-710-001 and read the result for the FMGC 1.

4. Fault Isolation
Subtask 22-83-00-810-088-B

A. If the test gives the maintenance message AFS: FMGC1/ATHR2 ENG WIRG:

replace the FMGC-1 [1CA1] , AMM 22-83-34-000-001 and AMM 22-83-34-400-001.

(1) If the fault continues:

do a check and repair the wiring of the ATH OPP ENGD COM OPP and ATH OPP ENGD MON OPP discretes (from the FMGC 1 (1CA1) to the first terminal block) ASM 223101.

Subtask 22-83-00-710-095-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:30 UTC