FIDS/FMGC2 BITE Inoperative

TASK 22-66-00-810-871-A
FIDS/FMGC2 BITE Inoperative

1. Possible Causes

FMGC-2 [1CA2]
FAC-1 [1CC1]
wiring of the FMGC OWN A bus from the FMGC2 (1CA2) to pin AD/10A, 10B of the FAC 1 (1CC1)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-66-34-000-002	Removal of the FAC
AMM 22-66-34-400-002	Installation of the FAC
ASM 226901
AMM 22-83-34-000-001	Removal of the FMGC
AMM 22-83-34-400-001	Installation of the FMGC
AMM 22-96-00-710-001	Operational Test of the AFS
AMM 22-97-00-710-001	Operational Test of the LAND CAT III Capability
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002	De-energize the Aircraft Electrical Circuits Supplied from the External Power

3. Fault Confirmation
Subtask 22-66-00-860-062-A

A. Job Set-up
(1) Aircraft Maintenance Configuration
(a) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.

Subtask 22-66-00-865-083-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AUTO FLT/FAC1/28VDC	5CC1	B04
49VU	AUTO FLT/MCDU/1	11CA1	B01
121VU	AUTO FLT/FMGC/2	10CA2	M17
121VU	AUTO FLT/MCDU/2	11CA2	N20

Subtask 22-66-00-710-185-A

C. Test
(1) Do the operational test of the AFS AMM 22-96-00-710-001 and read the result for the FMGC 2.
(2) Do the operational test of the LAND CAT III Capability AMM 22-97-00-710-001.

4. Fault Isolation
Subtask 22-66-00-810-142-A

A. If the test gives the maintenance message related to FIDS-FMGC2:

open the circuit breaker 10CA2
after 15 s, close this circuit breaker
do the Test in Para 3.C.

(1) If the fault continues:

replace the FMGC-2 [1CA2] AMM 22-83-34-000-001 and AMM 22-83-34-400-001

(a) If the fault continues:

open the circuit breaker 5CC1
after 15 s, close this circuit breaker
do the Test in Para 3.C.

1 If the fault continues:

replace the FAC-1 [1CC1] AMM 22-66-34-000-002 and AMM 22-66-34-400-002.

a If the fault continues:

do a check and repair the wiring of the FMGC OWN A bus from the FMGC2 (1CA2) to pin AD/10A, 10B of the FAC 1 (1CC1) ASM 226901.

Subtask 22-66-00-710-186-A

B. Do the test given in Para. 3.

5. Close-up
Subtask 22-66-00-860-063-A

A. Put the aircraft back to its initial configuration.
(1) On the MCDU, push the line key adjacent to the RETURN indication until the CFDS menu page comes into view.
(2) De-energize the aircraft electrical circuits
AMM 24-41-00-862-002.

[Rev.8 from Aug 2018] 2026.04.04 04:25:22 UTC