DOC AIRBUS | TSM A320FFailure of the Upper ECAM DU Pin Programming Detected by the DMC3
TASK 31-63-81-810-834-A
Failure of the Upper ECAM DU Pin Programming Detected by the DMC3
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 31-63-81-740-116-A ** ON A/C NOT FOR ALL Subtask 31-63-81-740-116-B ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 31-63-81-810-091-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:30:57 UTC
Failure of the Upper ECAM DU Pin Programming Detected by the DMC3
1. Possible Causes
ground signals at upper ECAM DU (4WT1) connector AA - DU-ECAM, UPPER [4WT1]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 31-60-00-740-002 | Perform Electronic Instrument System (EIS) Input Test |
| AMM 31-60-00-740-004 | EIS System Test |
| AMM 31-63-22-000-001 | Removal of the Display Unit |
| AMM 31-63-22-400-001 | Installation of the Display Unit |
| AWM 316806 |
Subtask 31-63-81-740-116-A ** ON A/C NOT FOR ALL Subtask 31-63-81-740-116-B ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 31-63-81-810-091-A ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
DMC3: DU ECAM1 POS PIN
Subtask 31-63-81-740-117-A ** ON A/C NOT FOR ALL DMC3: DU ECAM1 POS PIN
- do a check for
ground signals at upper ECAM DU (4WT1) connector AA AWM 316806.
- repair the wiring.
- replace the DU-ECAM, UPPER [4WT1] AMM 31-63-22-000-001 and AMM 31-63-22-400-001.
B. Do the test given in Para. 3.
Subtask 31-63-81-810-091-B ** ON A/C NOT FOR ALL C. If the test gives the maintenance message WRG: PIN PROG/DU EWD(4WT1)
Subtask 31-63-81-740-117-B ** ON A/C NOT FOR ALL - do a check for
ground signals at upper ECAM DU (4WT1) connector AA AWM 316806.
- repair the wiring.
- replace the DU-ECAM, UPPER [4WT1] AMM 31-63-22-000-001 and AMM 31-63-22-400-001.
D. Do the test given in Para. 3.