Loss of Mode S Communication between ATC1 and Ground Station

TASK 34-52-00-810-839-A
Loss of Mode S Communication between ATC1 and Ground Station

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-52-00-720-005	Functional Test of the ATC/Mode S Transponder
AMM 34-52-00-740-004	BITE Test of the ATC

3. Fault Confirmation
Subtask 34-52-00-740-116-A

A. First Step:

do the BITE test of the ATC1 AMM 34-52-00-740-004.

Subtask 34-52-00-720-051-A

B. Second Step:

do the functional test of ATC MODE S AMM 34-52-00-720-005.

4. Fault Isolation
Subtask 34-52-00-810-094-A

A. If the BITE test gives a maintenance message:

Do the trouble shooting procedure related to the maintenance message.

Subtask 34-52-00-810-095-A

B. If the BITE test is OK and the functional test is not OK:

do the trouble shooting procedure related to the test results.

Subtask 34-52-00-810-096-A

C. If the two tests are OK:

no maintenance action is necessary.

[Rev.8 from Aug 2018] 2026.04.04 04:33:24 UTC