Loss of the ADIRU Input Data to the ATC/MODE S Transponder 1

TASK 34-52-00-810-807-A
Loss of the ADIRU Input Data to the ATC/MODE S Transponder 1

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
AMM 34-52-00-740-004	BITE Test of the ATC
ASM 345201
AMM 34-52-33-000-001	Removal of the ATC/Mode S Transponder
AMM 34-52-33-400-001	Installation of the ATC/Mode S Transponder

3. Fault Confirmation
Subtask 34-52-00-740-062-B

A. Test
(1) Make sure that the Air Data Select switch 15FP is set to NORM.
(2) Do the BITE test of the ATC AMM 34-52-00-740-004.

4. Fault Isolation
Subtask 34-52-00-810-058-B

A. If the test gives the maintenance message : ADIRU 1/3 (1FP1/3)/ATC1(1SH1)

(1) If the fault continues :

(2) If the fault continues :

do a check and repair the wiring between the ADIRU 1 and the ATC/Mode S transponder 1 for the Air Data Input 1 bus ASM 345201.

Subtask 34-52-00-740-063-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:40:26 UTC