DOC AIRBUS | TSM A320FLoss of the Reception of the DMC 2 VALID Discrete by the FMGC 1
TASK 22-83-00-810-858-A
Loss of the Reception of the DMC 2 VALID Discrete by the FMGC 1
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-83-00-865-085-A
Subtask 22-83-00-810-139-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:32 UTC
Loss of the Reception of the DMC 2 VALID Discrete by the FMGC 1
1. Possible Causes
- FMGC-1 [1CA1]
- DMC-2 [1WT2]
wiring of the PFD OPP VALID discrete (from the FMGC 1 (1CA1) to the DMC 2 (1WT2))
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 228504 | |
| AMM 22-91-00-710-001 | Ground Scanning of the AFS |
| AMM 31-63-34-000-001 | Removal of the DMC |
| AMM 31-63-34-400-001 | Installation of the DMC |
Subtask 22-83-00-865-085-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 22-83-00-710-148-A 4. Fault Isolation| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | EIS/DMC2/SPLY | 10WT2 | Q08 |
| 121VU | EIS/DMC2/SWTG | 21WT2 | R08 |
Subtask 22-83-00-810-139-A
A. If the test gives the maintenance message AFS: CHK DMC2-FMGC1 CKT:
Subtask 22-83-00-710-149-A - replace the FMGC-1 [1CA1] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.
- replace the DMC-2 [1WT2] AMM 31-63-34-000-001 and AMM 31-63-34-400-001.
- do a check and repair the
wiring of the PFD OPP VALID discrete (from the FMGC 1 (1CA1) to the DMC 2 (1WT2)) ASM 228504.
B. Do the test given in Para. 3.