Loss of ATC/Mode S Transponder 1 Interface with FMGC 1 or ADIRU 1 or ATSU

TASK 34-52-00-810-843-A
Loss of ATC/Mode S Transponder 1 Interface with FMGC 1 or ADIRU 1 or ATSU

1. Possible Causes

FMGC-1 [1CA1]
XPDR-ATC/MODE S, 1 [1SH1]
ADIRU-1 [1FP1]
ATSU [1TX1]
wiring between the FMGC 1 and the ATC/ModeS transponder 1
wiring between the ADIRU 1 and the ATC/ModeS transponder 1
wiring between the ATSU and the ATC/ModeS transponder 1

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-83-34-000-001	Removal of the FMGC
AMM 22-83-34-400-001	Installation of the FMGC
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
ASM 345202
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
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 34-52-00-740-122-A

A. Test

do the BITE test of the ATC 1 AMM 34-52-00-740-004.

4. Fault Isolation
Subtask 34-52-00-810-102-A

A. If the test gives the maintenance message ATC1:NO DATA FROM DAPS/ADS-B SRC:

replace the FMGC-1 [1CA1] AMM 22-83-34-000-001 and AMM 22-83-34-400-001.

(1) If the fault continues:

replace the XPDR-ATC/MODE S, 1 [1SH1] AMM 34-52-33-000-001 and AMM 34-52-33-400-001.

(2) If the fault continues:

replace the ADIRU-1 [1FP1] AMM 34-12-34-000-001 and AMM 34-12-34-400-001.

(3) If the fault continues:

replace the ATSU [1TX1] AMM 46-21-34-000-001 and AMM 46-21-34-400-001.

(4) If the fault continues:
(a) Remove the FMGC 1 and the ATC/Mode S transponder 1.
(b) Do a check and repair the wiring between the FMGC 1 and the ATC/ModeS transponder 1: between pins AB/11A, 11B and pins AA/6A, 6B ASM 345201.
(c) Install the FMGC 1 and the ATC/Mode S transponder 1.
(5) If the fault continues:
(a) Remove the ADIRU 1 and the ATC/Mode S transponder 1.
(b) Do a check and repair the wiring between the ADIRU 1 and the ATC/ModeS transponder 1: between pins AB/10C, 11C and pins AA/2A, 2B ASM 345202.
(c) Install the ADIRU 1 and the ATC/Mode S transponder 1.
(6) If the fault continues:
(a) Remove the ATSU and the ATC/Mode S transponder 1.
(b) Do a check and repair the wiring between the ATSU and the ATC/ModeS transponder 1: between pins AA/2J, 2K and pins AA/2C, 2D ASM 345202.
(c) Install the ATSU and the ATC/Mode S transponder 1.

Subtask 34-52-00-740-123-A

B. Do the test given in Para. 3.A.

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