Loss of the MCDU3 Data Detected by the ATSU

TASK 46-21-00-810-812-A
Loss of the MCDU3 Data Detected by the ATSU

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 46-21-00-740-001	BITE Test of the ATIMS

3. Fault Confirmation
Subtask 46-21-00-740-072-A

A. Test
(1) Do the BITE test of the ATIMS AMM 46-21-00-740-001.

4. Fault Isolation
Subtask 46-21-00-810-061-C

A. If the test gives the maintenance message MCDU3(3CA3)/ATSU1(1TX1):

Subtask 46-21-00-740-073-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:18 UTC