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

TASK 22-83-00-810-843-A
Loss of the Reception of the ILS 1 Bus by one FMGC

1. Possible Causes

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 34-36-31-000-001	Removal of the ILS Receiver
AMM 34-36-31-400-001	Installation of the ILS Receiver

3. Fault Confirmation
Subtask 22-83-00-865-070-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	NAV/MMR/1	42RT1	G12
** ON A/C NOT FOR ALL
49VU	NAV/ILS/1	1RT1	G12

Subtask 22-83-00-710-118-A

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

4. Fault Isolation
Subtask 22-83-00-810-114-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message AFS : ILS1 (ISSUED BY : FG1):

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the ILS OWN bus from the FMGC 1 (1CA1) to the ILS receiver 1 (2RT1) ASM 228601.

Subtask 22-83-00-810-114-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message AFS : ILS1 (ISSUED BY : FG1):

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the ILS OWN bus from the FMGC 1 (1CA1) to the ILS receiver 1 (2RT1) ASM 228601.

Subtask 22-83-00-810-115-A

B. If the test gives the maintenance message AFS : ILS1 (ISSUED BY : FG2):

(1) If the fault continues:

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

Subtask 22-83-00-710-119-A

C. Do the test given in Para. 3.

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