ATSU Software Failure

TASK 46-21-00-810-847-A
ATSU Software Failure

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 46-21-00-740-140-A

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

4. Fault Isolation
Subtask 46-21-00-810-097-A

A. If the test gives the maintenance message ATSU1(1TX1) or if the fault symptom identified by the crew observation is "Access to ATSU menu not possible on the MCDU MENU page":
(1) Open and close the circuit breakers 3TX1 and 5TX1 to reset the ATSU (wait one minute approximately).

5. Close-up
Subtask 46-21-00-740-141-A

A. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:21 UTC