DOC AIRBUS | TSM A320FLoss of the FMGC 1 OWN CB2 Bus (IR 2 Source)
TASK 22-83-00-810-819-A
Loss of the FMGC 1 OWN CB2 Bus (IR 2 Source)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-83-00-865-056-A
Subtask 22-83-00-810-072-B
[Rev.8 from Aug 2018]
2026.04.04 04:25:30 UTC
Loss of the FMGC 1 OWN CB2 Bus (IR 2 Source)
1. Possible Causes
- FMGC-1 [1CA1]
wiring of the FMGC OWN CB2 (COM) bus (from the FMGC 1 (1CA1) 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 228602 | |
| AMM 34-14-00-740-001 | Interface Test of the IR |
Subtask 22-83-00-865-056-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 22-83-00-740-062-A 4. Fault Isolation| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | AUTO FLT/FMGC/1 | 10CA1 | B02 |
Subtask 22-83-00-810-072-B
A. If the test gives the maintenance message FMGC1 (1CA1)/ADIRU2 (1FP2):
Subtask 22-83-00-740-063-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 FMGC OWN CB2 (COM) bus (from the FMGC 1 (1CA1) to the first terminal block) ASM 228602.
B. Do the test given in Para. 3.