Removal of the Flight Management and Guidance Computer (FMGC)

TASK 22-83-34-000-001-A
Removal of the Flight Management and Guidance Computer (FMGC)

ZONE: 127
ZONE: 128
FIN: 1CA1
FIN: 1CA2

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
128	REAR AVIONIC COMPARTMENT
824

C. 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)
TASK 31-32-00-860-001-A	Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
FMGC

3. Job Set-up
Subtask 22-83-34-810-050-A

A. Trouble Shooting Data (TSD)
You can print the TSD as follows:

Get access to the "SYSTEM REPORT/TEST" menu page (Ref. AMM TASK 31-32-00-860-001).
On this page, push the line select key adjacent to the "AFS" indication.
On the "AFS MAIN MENU" page, push the line select key adjacent to the "TROUBLE SHOOTING DATA" indication to get access to the "TROUBLE SHOOTING" page.
On this page, push the line select key adjacent to the "BITE SELECTION" (FG1 and FG2, COM and MON, FM1 and FM2) indication to get access to the "TROUBLE SHOOTING" page(s).
Print the "TROUBLE SHOOTING" page(s).

Subtask 22-83-34-860-051-B

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the center pedestal, on the Multipurpose Control & Display Unit (MCDU):
(a) Adjust the brightness of the MCDU screen.
(b) Push the DATA mode key to get access to the "DATA INDEX" page.
(c) Push the line select key adjacent to the "A/C STATUS" indication.
(d) Record the IDLE/PERF value (shown adjacent to line select key 6L).
(e) Set the brightness to OFF.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 22-83-34-865-050-A

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1CA1 (FMGC1)
49VU	AUTO FLT/FMGC/1	10CA1	B02
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FMGC/1	10CA1	H08
** ON A/C ALL
FOR FIN: 1CA2 (FMGC2)
121VU	AUTO FLT/FMGC/2	10CA2	M17

Subtask 22-83-34-010-051-A

D. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position at zone 128.
(2) Open access door 824.

4. Procedure
Subtask 22-83-34-020-051-A

A. Removal of the FMGC

NOTE: The procedure is the same for FMGCs 1CA1 and 1CA2.

(1) Loosen the nuts (3) on the front of the rack (2).
(2) Lower the nuts (3).
(3) Pull the FMGC (5) on its rack (2) to disconnect the electrical connectors (1).
(4) Remove the FMGC (5) from its rack (2).
(5) Put the CAP - BLANKING on the electrical connectors (1).

[Rev.10 from 2021] 2026.03.31 23:11:16 UTC