Brightness too Low on the F/O ND DU

TASK 31-63-82-810-860-A
Brightness too Low on the F/O ND DU

1. Possible Causes

ND-F/O [3WT2]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-740-010	Operational Check of Brightness Control Through MCDU
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 31-63-82-710-055-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the operational check of the brightness control through the MCDU AMM 31-60-00-740-010.

4. Fault Isolation
Subtask 31-63-82-810-150-A ** ON A/C NOT FOR ALL

A. If the DU ND FO(3WT2) message comes into view:
(1) Replace ND-F/O [3WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001.
(2) Do the test(s) given in the Para. Fault Confirmation.

Subtask 31-63-82-810-151-A ** ON A/C NOT FOR ALL

B. If the DU ND FO(3WT2) / BRIGHTNESS message comes into view and if the flight crew confirmed that the brightness was too low:
(1) Replace ND-F/O [3WT2] AMM 31-63-22-000-001 and AMM 31-63-22-400-001.
(2) Do the test(s) given in the Para. Fault Confirmation.

[Rev.8 from Aug 2018] 2026.04.04 04:31:17 UTC