Disagree between the A/THR ENGD Discretes (FMGC1 and FMGC2)

TASK 22-31-00-810-814-A
Disagree between the A/THR ENGD Discretes (FMGC1 and FMGC2)

1. Possible Causes

FMGC-1 [1CA1]
FMGC-2 [1CA2]
wiring of the ATH OWN ENGD (COM and MON) OPP and ATH OPP ENGD (COM and MON) OPP discretes between the FMGC1 and the FMGC2

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 22-31-00-710-076-A

A. Test
(1) On the FCU, push the A/THR pushbutton switch.
(2) Do the operational test of the AFS AMM 22-96-00-710-001 and read the results for the FMGC1 and for the FMGC2.

4. Fault Isolation
Subtask 22-31-00-810-069-A

A. If the test gives the maintenance messages AFS: FMGC2/ATHR ENGD FDBK for the FMGC2 and AFS: FMGC1/ATHR2 ENG WIRG for the FMGC1:

remove the FMGC-1 [1CA1] AMM 22-83-34-000-001
do the operational test of the AFS AMM 22-96-00-710-001.

(1) If the test gives the message: AFS TEST OK

replace the FMGC-2 [1CA2] AMM 22-83-34-400-001

(2) If the test result of the FMGC2 gives the maintenance message AFS: FMGC2/ATHR ENGD FDBK:

replace the FMGC-2 [1CA2] AMM 22-83-34-000-001 AMM 22-83-34-400-001.

(3) If the fault continues:

do a check and repair of the wiring of the ATH OWN ENGD (COM and MON) OPP and ATH OPP ENGD (COM and MON) OPP discretes between the FMGC1 and the FMGC2 ASM 223101.

Subtask 22-31-00-710-077-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:09 UTC