Loss of the Lower ECAM DU by the DMC1

TASK 31-63-81-810-879-A
Loss of the Lower ECAM DU by the DMC1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-720-002	Operational Test of the DMC/DU data bus
AMM 31-60-00-740-002	Perform Electronic Instrument System (EIS) Input 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 31-63-81-740-204-A ** ON A/C NOT FOR ALL

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

Subtask 31-63-81-740-204-B ** ON A/C NOT FOR ALL

A. Test
Do the operational test of the DMC/DU data bus AMM 31-60-00-720-002.

4. Fault Isolation
Subtask 31-63-81-810-135-A

A. If the test gives the maintenance message DMC1 - DU ECAM2 LINK:

(1) If the fault continues:

do a check of the wiring from the lower ECAM DU (4WT2) to the DMC1 (1WT1)> ASM 316104.

(a) If there is no continuity:

(b) If there is continuity:

Subtask 31-63-81-740-205-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:31:01 UTC