Failure of the Lower ECAM DU Detected by the DMC2

TASK 31-63-81-810-811-A
Failure of the Lower ECAM DU Detected by the DMC2

1. Possible Causes

2. Job Set-up Information
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
ASM 316104
AMM 31-63-22-000-001	Removal of the Display Unit
AMM 31-63-22-400-001	Installation of the Display Unit
AMM 31-63-34-000-001	Removal of the DMC
AMM 31-63-34-400-001	Installation of the DMC

3. Fault Confirmation
Subtask 31-63-81-740-070-A ** ON A/C NOT FOR ALL

A. Test
Do the EIS input test AMM 31-60-00-740-002.

Subtask 31-63-81-740-070-B ** ON A/C NOT FOR ALL

A. Test
Do the EIS system test AMM 31-60-00-740-004.

4. Fault Isolation
Subtask 31-63-81-810-063-A

A. If the test gives the maintenance message DMC3 - DU ECAM2 LINK:

(1) If the fault continues:

do a check of the wiring from the lower ECAM DU (4WT2) to the DMC2 (1WT2):
. pins AA/35, 36 to pins AB/11B, 11C
. pins AA/38, 39 to pins AB/11D, 11E ASM 316104.

(a) If there is no continuity:

(b) If there is continuity:

1 If the fault continues:

do a check and repair the wiring from the DMC2 (1WT2) to the DMC3 (1WT3):
. pins AB/11H, 11J to pins AB/11B, 11C
. pins AB/11F, 11G to pins AB/11D, 11E.

Subtask 31-63-81-740-071-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:30:54 UTC