ATSU Software Uploading Not Possible

TASK 46-21-00-810-856-A
ATSU Software Uploading Not Possible

1. Possible Causes

wiring of the A/C on ground signal

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 32-31-71-000-001	Removal of the LGCIU
AMM 32-31-71-400-001	Installation of the LGCIU
AMM 46-21-00-610-001	Uploading of the ATSU Software with the PDL (SFIM or equivalent)
ASM 462104
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 46-21-00-700-050-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the uploading of the ATSU software AMM 46-21-00-610-001.

4. Fault Isolation
Subtask 46-21-00-810-105-A ** ON A/C NOT FOR ALL

A. If WAIT RESPONSE stays in view on the MDDU:
(1) Remove the ATSU AMM 46-21-34-000-001.
(2) Make sure that all the electrical connections are clean and in the correct condition.
(3) Do a check for a ground signal at pin AA/14G of the ATSU:
(a) If there is a ground signal:

Install the ATSU AMM 46-21-34-400-001.

(b) If there is no ground signal:
1 Remove the LGCIU1 AMM 32-31-71-000-001.
2 Do a check and repair the wiring of the A/C on ground signal between:

The pin AB/2H of the LGCIU1 and pin AA/14G of the ATSU
ASM 462104.

3 Install the LGCIU1 AMM 32-31-71-400-001.
4 Install the ATSU AMM 46-21-34-400-001.

Subtask 46-21-00-700-051-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:34:22 UTC