Failure of the ATSU

TASK 46-21-00-810-801-A
Failure of the ATSU

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 46-21-00-610-001	Uploading of the ATSU Software with the PDL (SFIM or equivalent)
AMM 46-21-00-740-001	BITE Test of the ATIMS
AMM 46-21-00-860-001	Initialization Procedure of the ATSU Router
AMM 46-21-34-000-001	Removal of the Air Traffic Service Unit (ATSU)
AMM 46-21-34-400-001	Installation of the Air Traffic Service Unit (ATSU)

3. Fault Confirmation
Subtask 46-21-00-740-050-A

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

4. Fault Isolation
Subtask 46-21-00-810-050-F

A. If the test gives the maintenance message ATSU1(1TX1):
(1) Do a check of the ATSU software configuration:

Make sure that the references of the ATSU A/C Interface, the ATSU CONFIGURATION and the ATSU ROUTER PARAMETERS software loaded in the ATSU are respectively the same as the references read on the disks AMM 46-21-00-610-001.

(a) If they are different, do the related uploading procedure.
(b) If the two references are the same:

1 If the fault continues:

Subtask 46-21-00-740-051-A

B. Do the test given in Para. 3.

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