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

TASK 22-83-00-810-845-A
Loss of the Reception of the RA 1 Bus by one FMGC

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 34-42-00-810-845-A	Radio Altitude Set to No Computed Data
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

3. Fault Confirmation
Subtask 22-83-00-865-072-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/RAD ALTM/1	1SA1	K11

Subtask 22-83-00-710-122-A

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

4. Fault Isolation
Subtask 22-83-00-810-118-A

A. If the test gives the maintenance message AFS : RA1 (ISSUED BY : FG1):

(1) If the fault continues:

Do a check and repair the wiring of the RA OWN bus from the FMGC 1 (1CA1) to the first terminal block ASM 228601.

(2) If the fault continues:

Subtask 22-83-00-810-119-A

B. If the test gives the maintenance message AFS : RA1 (ISSUED BY : FG2):

(1) If the fault continues:

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

(2) If the fault continues:

Subtask 22-83-00-810-194-A

C. If the test gives no maintenance message:

Subtask 22-83-00-710-123-A

D. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:32 UTC