Loss of the Reception of the DME 1 Bus by one FMGC

TASK 22-83-00-810-839-A
Loss of the Reception of the DME 1 Bus by one FMGC

1. Possible Causes

FMGC-1 [1CA1]
INTRG-DME, 1 [2SD1]
wiring of the DME OWN bus from the FMGC 1 (1CA1) to the DME interrogator 1 (2SD1)
FMGC-2 [1CA2]
wiring of the DME OPP bus from the FMGC 2 (1CA2) to the first terminal block

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
ASM 228601
AMM 22-91-00-710-001	Ground Scanning of the AFS
AMM 34-51-33-000-001	Removal of the DME Interrogator
AMM 34-51-33-400-001	Installation of the DME Interrogator

3. Fault Confirmation
Subtask 22-83-00-865-066-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	NAV/DME/1	1SD1	G14

Subtask 22-83-00-710-110-A

B. Test
(1) Do the Ground Scanning of the AFS AMM 22-91-00-710-001.

4. Fault Isolation
Subtask 22-83-00-810-106-A

A. If the test gives the maintenance message AFS : DME1 (ISSUED BY : FM1):

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the DME OWN bus from the FMGC 1 (1CA1) to the DME interrogator 1 (2SD1) ASM 228601.

Subtask 22-83-00-810-107-A

B. If the test gives the maintenance message AFS : DME1 (ISSUED BY : FM2):

(1) If the fault continues:

do a check and repair the wiring of the DME OPP bus from the FMGC 2 (1CA2) to the first terminal block ASM 228601.

Subtask 22-83-00-710-111-A

C. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:31 UTC