DOC AIRBUS | TSM A320FLoss of the Reception of the MCDU 1 TRANSMITTER Bus by one FMGC
TASK 22-82-00-810-804-A
Loss of the Reception of the MCDU 1 TRANSMITTER Bus by one FMGC
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-82-00-710-056-A 4. Fault Isolation
Subtask 22-82-00-810-054-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:27 UTC
Loss of the Reception of the MCDU 1 TRANSMITTER Bus by one FMGC
1. Possible Causes
- FMGC-1 [1CA1]
wiring of the MCDU OPP IN bus (from the FMGC 1 (1CA1) to the first terminal block) - FMGC-2 [1CA2]
wiring of the MCDU OWN IN bus (from the FMGC 2 (1CA2) to the first terminal block)
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 228604 | |
| AMM 22-91-00-710-001 | Ground Scanning of the AFS |
Subtask 22-82-00-710-056-A 4. Fault Isolation
Subtask 22-82-00-810-054-A
A. If the test gives the maintenance message AFS: MCDU1 (ISSUED BY: FM1):
Subtask 22-82-00-810-055-A - replace the FMGC-1 [1CA1] , AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
- do a check and repair the
wiring of the MCDU OPP IN bus (from the FMGC 1 (1CA1) to the first terminal block) , ASM 228604.
B. If the test gives the maintenance message AFS: MCDU1 (ISSUED BY: FM2):
Subtask 22-82-00-710-057-A - replace the FMGC-2 [1CA2] , AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
- do a check and repair the
wiring of the MCDU OWN IN bus (from the FMGC 2 (1CA2) to the first terminal block) , ASM 228604.
C. Do the test given in Para. 3.