Failure of the Upper ECAM DU

TASK 31-63-81-810-870-A
Failure of the Upper ECAM DU

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
AMM 31-63-22-000-001	Removal of the Display Unit
AMM 31-63-22-400-001	Installation of the Display Unit

3. Fault Confirmation
Subtask 31-63-81-740-188-A ** ON A/C NOT FOR ALL

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

Subtask 31-63-81-740-188-B ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 31-63-81-810-127-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DU ECAM 1:

Subtask 31-63-81-810-127-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DU EWD(4WT1)

Subtask 31-63-81-740-189-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:31:00 UTC