DOC AIRBUS | TSM A320FFCU Inoperative
TASK 22-81-00-810-810-A
FCU Inoperative
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-81-00-710-067-A
Subtask 22-81-00-810-065-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:25 UTC
FCU Inoperative
1. Possible Causes
- FCU [2CA]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 24-00-00-810-818-A | Computer Reset |
| AMM 22-81-12-000-001 | Removal of the FCU |
| AMM 22-81-12-400-001 | Installation of the FCU |
| AMM 22-96-00-710-001 | Operational Test of the AFS |
Subtask 22-81-00-710-067-A
A. Test
(1) Do the operational test of the AFS AMM 22-96-00-710-001 and read the result for the FMGC 1.
4. Fault Isolation(1) Do the operational test of the AFS AMM 22-96-00-710-001 and read the result for the FMGC 1.
Subtask 22-81-00-810-065-A
A. If the test gives the maintenance message AFS : FCU (APPR NOT ENGAGED):
Subtask 22-81-00-710-071-A - do a FCU reset procedure (Ref. TSM TASK 24-00-00-810-818).
NOTE: The 7 minute reset is necessary to do a full test sequence of the FCU.
(1) If the fault continues: - replace the FCU [2CA] AMM 22-81-12-000-001 and AMM 22-81-12-400-001.
B. Do the test given in Para. 3.