Deactivation of the Flight Management and Guidance Computer (FMGC)

TASK 22-83-00-040-802-A
Deactivation of the Flight Management and Guidance Computer (FMGC)

1. Reason for the Job
MMEL 22-83-01
FLIGHT MANAGEMENT GUIDANCE COMPUTER (FMGC) (FAA ONLY)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)

3. Job Set-up
Subtask 22-83-00-861-052-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 22-83-00-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FMGC/1	10CA1	B02
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FMGC/1	10CA1	H08
** ON A/C ALL
121VU	AUTO FLT/FMGC/2	10CA2	M17

4. Procedure
Subtask 22-83-00-040-050-A

A. Deactivation of the FMGC
(1) For the deactivation of FMGC1:
(a) Open, safety and tag this(these) circuit breaker(s):

10CA1.

(2) For the deactivation of FMGC2:
(a) Open, safety and tag this(these) circuit breaker(s):

10CA2.

Subtask 22-83-00-869-051-A

B. System and Cockpit Effects
(1) On the SD, on the "STATUS" page:

The "F/CTL MAINTENANCE" message comes into view.

5. Close-up
Subtask 22-83-00-860-060-A

A. Aircraft Maintenance Configuration
(1) Put an applicable placard in position in the cockpit (refer to your standard practices and local regulations).
(2) Make an entry in the logbook.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(4) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.02 06:11:54 UTC