FMGC Malfunction

TASK 22-83-00-810-893-A
FMGC Malfunction

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-70-00-610-006	Downloading of the FM Data
AMM 22-96-00-710-001	Operational Test of the AFS

3. Fault Confirmation
Subtask 22-83-00-710-186-A

A. Test
(1) On the panels 49VU and 121VU, open (from more than 5 seconds) and close the circuit breaker 10CA1 and 10CA2 respectively.
(2) Do the Operational Test of the AFS AMM 22-96-00-710-001.

4. Fault Isolation
Subtask 22-83-00-810-176-A

A. If the test does not give maintenance message (and if investigation is required):
(1) If the Post Flight Report (PFR) fault message is recorded during flight phase 4 or 9:

no maintenance action is necessary.

(2) If the Post Flight Report (PFR) fault message is not recorded during flight phase 4 or 9:

get access to the AFS/TROUBLE SHOOTING DATA/BITE SELECTION and do a check of the result for the FM (1 and 2), FG1 (COM & MON) and FG2 (COM & MON) system parts by pressing the corresponding prompt:

(a) If there is no TSD dated from the same date/time as the PFR message:

no maintenance action is necessary.

(b) If there is TSD(s) dated from the same date/time as the PFR message:
1 for FG TSD(s):

print any associated TSD for FG1 (COM & MON)/FG2 (COM & MON) system parts and send it back to Airbus for subsequent analysis.
no further maintenance action is necessary.

2 for FM TSD(s):

print the associated TSD for FM (1 and 2) system parts and send it back to Airbus for subsequent analysis.
download the FM (1 and 2) BITE data AMM 22-70-00-610-006
no further maintenance action is necessary.

Subtask 22-83-00-810-178-A

B. If the test gives one or several maintenance messages:

do the trouble shooting procedure related to the maintenance message.

[Rev.8 from Aug 2018] 2026.04.04 04:25:34 UTC