Loss of the Brightness Control on the EWD DU

TASK 31-63-00-810-980-A
Loss of the Brightness Control on the EWD DU

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-740-004	EIS System Test
AMM 31-61-12-000-001	Removal of the ECAM Control Panel
AMM 31-61-12-400-001	Installation of the ECAM Control Panel
AMM 31-63-22-000-001	Removal of the Display Unit
AMM 31-63-22-400-001	Installation of the Display Unit
ASM 316800

3. Fault Confirmation
Subtask 31-63-00-740-360-A ** ON A/C NOT FOR ALL

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

4. Fault Isolation
Subtask 31-63-00-810-233-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DU EWD(4WT1)/ECP(6WT):

(1) If the fault continues:

(2) If the fault continues:

remove the EWD DU (4WT1) and the ECAM CTL PNL (6WT) AMM 31-63-22-000-001
check the wiring between the connector AA of the EWD DU (4WT1) and the connector B of the ECAM CTL PNL (6WT) ASM 316800.
install the EWD DU and the ECAM CTL PNL AMM 31-63-22-400-001

5. Close-up
Subtask 31-63-00-740-361-A ** ON A/C NOT FOR ALL

A. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:30:50 UTC