Display System Version Inconsistency of the upper ECAM DU

TASK 31-63-81-810-940-A
Display System Version Inconsistency of the upper ECAM DU

1. Possible Causes

DU-ECAM, UPPER [4WT1]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-610-001	X LOADING Procedure of the DMC1 to the PFD CAPT, ND CAPT, the EWD or the SD
AMM 31-60-00-740-004	EIS System Test
AMM 31-60-00-740-011	LRU Identification Check
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 31-63-81-860-080-A ** ON A/C NOT FOR ALL

A. Reset the DU
(1) On the ECAM Control Panel (6WT):

turn the ECAM upper display potentiometer to the OFF position then to the BRT middle position. If the DISPLAY SYSTEM VERSION INCONSISTENCY message is not shown on the upper ECAM DU
no maintenance action is necessary.

(a) If the DISPLAY SYSTEM VERSION INCONSISTENCY message is shown on the upper ECAM DU

do the following test.

Subtask 31-63-81-740-322-A ** ON A/C NOT FOR ALL

B. Test

Do the EIS System Test AMM 31-60-00-740-004

4. Fault Isolation
Subtask 31-63-81-810-221-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message INVALID LRU IDENT:

Do the LRU Identification Check AMM 31-60-00-740-011

(1) Make sure that the EIS software P/N of the upper ECAM DU is the same as the EIS software P/N on the microdisk that is in the storage box.
(a) If the part numbers are the same:

replace the DU-ECAM, UPPER [4WT1] AMM 31-63-22-000-001 AMM 31-63-22-400-001

(b) If the part numbers are not the same:

do the crossloading of the DMC1 to the upper ECAM DU AMM 31-60-00-610-001

Subtask 31-63-81-740-323-A ** ON A/C NOT FOR ALL

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

[Rev.8 from Aug 2018] 2026.04.04 04:31:07 UTC