Installation of the Flight Management and Guidance Computer (FMGC)

TASK 22-83-34-400-001-D
Installation of the Flight Management and Guidance Computer (FMGC)

ZONE: 127
ZONE: 128
FIN: 1CA1 ** ON A/C NOT FOR ALL
FIN: 1CA2 ** ON A/C NOT FOR ALL

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

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 22-10-00-710-002-A	Operational Check of AP Disengagement and Locking Devices of Side Stick Controller and Rudder Pedals
TASK 22-70-00-610-008-D	Uploading of the Flight Management (FM) Data to the Flight Management and Guidance Computer (FMGC)
TASK 22-70-00-610-009-A	Crossloading of the Flight Management (FM) Data
TASK 22-96-00-710-001-A	Operational Test of the AFS
TASK 22-97-00-710-001-A	Operational Test of the LAND CAT III Capability
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 31-32-00-860-001-A	Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
FMGC

3. Job Set-up
Subtask 22-83-34-860-057-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at access door 824, at zone 128.
(2) Make sure that access door 824 is open.

Subtask 22-83-34-865-057-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

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

4. Procedure
Subtask 22-83-34-420-054-A ** ON A/C NOT FOR ALL

A. Installation of the FMGC
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking caps from the electrical connectors (1).
(4) Make sure that the electrical connectors (1) are in the correct condition.
(5) Install the FMGC (5) on its rack (2).
(6) Push the FMGC (5) on the rack (2) to connect the electrical connectors (1).

CAUTION: MAKE SURE THAT THE OBRM(S) IS (ARE) CORRECTLY INSTALLED. IF IT (THEY) IS(ARE) NOT INSTALLED CORRECTLY, PUSH THE OBRM(S) UNTIL THE LOCKING DEVICES ARE LOCKED.

(7) Engage the nuts (3) on the studs (4) and tighten them.

Subtask 22-83-34-865-058-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close 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
FOR FIN: 1CA2 (FMGC2)
121VU	AUTO FLT/FMGC/2	10CA2	M17

Subtask 22-83-34-860-058-B ** ON A/C NOT FOR ALL

C. 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) Make sure that the "IDLE/PERF" value is the same as the value you recorded during the removal. If it is not, enter "ARM" in the "CHG CODE" line adjacent to line select key 5L.

NOTE: "ARM" is the initial code. You can change it when you enter three other characters in the airline modifiable-information file.

(e) Record the "IDLE/PERF" value in the scratchpad.
(f) Enter this value adjacent to line select key 6L.
(g) Set the brightness to OFF.

Subtask 22-83-34-710-057-D ** ON A/C NOT FOR ALL

D. Do these tests:
(1) Do the operational test of the Automatic Flight System (AFS) (Ref. AMM TASK 22-96-00-710-001).

NOTE: As an alternative, you can do this operational test without the Centralized Fault Display System (CFDS) (Ref. AMM TASK 22-10-00-710-002).

(2) On the center pedestal, on MCDU1(2):

Get access to the "A/C STATUS" page.

(a) On the "A/C STATUS" page, do a check of the Part Number (P/N) of the installed FMGC (for this, open the circuit breaker of the opposite FMGC):

The FM operational software-component with the FMS operational program-disk (1CAMD3) or the FMS operational-program CD-ROM (1CAMD7)
(Page 2: FMS SOFTWARE)
The navigation database with the active nav database-disk (the navigation database changes at intervals of 28 days)
(Page 3: NAV DATA BASE)
The airline modifiable-information file with the applicable disk
(Page 4: FM AIRLINE CONFIG (AMI))
The operational program-configuration file with the FMS option configuration-disk (1CAMD1) or the FMS option-configuration CD-ROM (1CAMD5)
(Page 5: FM OPTIONS CONFIG (OPC))
The performance database with the FMS performance database-disk (1CAMD2) or the FMS performance-database CD-ROM (1CAMD6)
(Page 6: PERF DATA BASE)
The magnetic variation database with the applicable disk (1CAMD4) or the FMS magnetic variation-database CD-ROM (1CAMD8)
(Page 7: MAG VAR DATA BASE).

If necessary, upload the correct database (Ref. AMM TASK 22-70-00-610-008).
Do the crossloading of the Flight Management (FM) data (Ref. AMM TASK 22-70-00-610-009).
Do the LAND CAT 3 capability test if the aircraft operates in the CAT 3 condition (Ref. AMM TASK 22-97-00-710-001).

Subtask 22-83-34-710-058-A ** ON A/C NOT FOR ALL

E. Check of the FMGC P/N (with the CFDS)

NOTE: This check is only applicable for a new FMGC or an FMGC in which an On Board Replaceable Module (OBRM) was replaced because of a fault.

(1) Get access to the "SYSTEM REPORT/TEST" page (Ref. AMM TASK 31-32-00-860-001).

NOTE: The actions and the results of this procedure occur on the MCDU that you use.

ACTION	RESULT
On the MCDU: 1.Push the line select key adjacent to the "AFS" indication.	On the MCDU: The "AFS MAIN MENU" page comes into view.
2.Push the line select key adjacent to the "LRU IDENT" indication.	The "LRU IDENTIFICATION" page comes into view.

(2) Make sure that the P/N shown on the "LRU IDENTIFICATION" page is the same as the computer P/N (written on the front face of the FMGC).
(3) If the P/N is not the same, remove the computer and send it back to the shop.

5. Close-up
Subtask 22-83-34-410-053-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 824 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

[Rev.10 from 2021] 2026.03.31 23:11:20 UTC