DOC AIRBUS | TSM A320FLoss of the FMGC 2 OWN CB2 Bus (IR 3 Source)
TASK 22-83-00-810-822-A
Loss of the FMGC 2 OWN CB2 Bus (IR 3 Source)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-83-00-865-059-A
Subtask 22-83-00-810-075-B
[Rev.8 from Aug 2018]
2026.04.04 04:25:30 UTC
Loss of the FMGC 2 OWN CB2 Bus (IR 3 Source)
1. Possible Causes
- FMGC-2 [1CA2]
wiring of the FMGC OWN CB2 (COM) 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 228602 | |
| AMM 34-14-00-740-001 | Interface Test of the IR |
Subtask 22-83-00-865-059-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 22-83-00-740-068-A 4. Fault Isolation| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | AUTO FLT/FMGC/2 | 10CA2 | M17 |
Subtask 22-83-00-810-075-B
A. If the test gives the maintenance message FMGC2 (1CA2)/ADIRU3 (1FP3):
Subtask 22-83-00-740-069-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 FMGC OWN CB2 (COM) bus (from the FMGC 2 (1CA2) to the first terminal block) ASM 228602.
B. Do the test given in Para. 3.