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• Autothrust (A/THR) command.
The Flight Envelope (FE) part controls the following functions:‐
• Computation of data for the flight envelope and speed functions
• Monitoring of parameters used by FG and FE parts
• Windshear and aft Center of Gravity (CG) detection
• Computation of GW and CG information.
The Fault Isolation and Detection System (FIDS) part performs the following functions:‐
• Acquisition and concentration of maintenance data
• Interface with the Central Maintenance Computer (CMC).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
DESCRIPTION
A330/A340 FLEET DSC-22_10-10 P 3/8
FCOM 19 AUG 10
Each FMGEC has its own database (one Mega words – 16 bits) and contains these main data
bases:
1. The Navigation database contains standard navigation data: Navaids, waypoints, airways, enroute
information, holding patterns, airports, runways, procedures (SIDs, STARs, etc.), company routes,
fuel policy, and alternates.
The airline updates this part every 28 days, and is responsible for defining, acquiring, updating,
loading, and using this data. The update operation takes 20 min to complete, or 5 min if
crossloaded from the opposite FMGEC.
2. The Aircraft Performance Database includes the Engine model, Aerodynamic model, and
Performance model. The airline cannot modify this database.
3. Each FMGEC contains elements stored by the flight crew that enable them to generate 20
waypoints, 10 runways, 20 navaids and 5 routes.
Note: When the two FMGECs are not working with the same database, the FMGES operates in
independent operation. (Refer to DSC-22_10-30 Independent Mode).
FLIGHT MANAGEMENT GUIDANCE AND ENVELOPE COMPUTER (FMGEC)
Applicable to: ,
Each FMGEC is divided in four main parts:
The Flight Management (FM) part controls the followi‐ng functions:
• Navigation and management of navigation radios
• Flight planning and management
• Performance prediction and optimization
• Display management.
The Flight Guidance (FG) part performs the following functions:‐
• Autopilot (AP) command
• Flight Director (FD) command
• Autothrust (A/THR) command.
The Flight Envelope (FE) part controls the following functions:‐
• Computation of data for the flight envelope and speed functions
• Monitoring of parameters used by FG and FE parts
• Windshear and aft Center of Gravity (CG) detection
• Computation of GW and CG information.
The Fault Isolation and Detection System (FIDS) part performs the following functions:‐
• Acquisition and concentration of maintenance data
• Interface with the Central Maintenance Computer (CMC).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
DESCRIPTION
A330/A340 FLEET DSC-22_10-10 P 4/8
FCOM 19 AUG 10
Each FMGEC has its own set of databases. The individual databases can be independently loaded
into their respective FMGEC, or independently copied from one FMGEC to the other. Each FMGEC
contains these main databases:
1. The Navigation database (2.8 Mbytes) contains standard navigation data: Navaids, waypoints,
airways, enroute information, holding patterns, airports, runways, procedures (SIDs, STARs, etc.),
company routes, fuel policy, and alternates.
The airline updates this part every 28 days, and is responsible for defining, acquiring, updating,
loading, and using this data. The update operation takes 20 min to complete, or 5 min if
crossloaded from the opposite FMGEC.
2. The Airline Modifiable Information (AMI), also decribed as the FM Airline Configuration file,
contains:
Airline policy values: THR RED altitude, ACC altitude, EO ACC altitude, PERF factor, and IDLE‐
factor.
Fuel policy values: Fuel for taxi, percentage of route reserve, maximum and minimum values of‐
route reserve, etc.
AOC functions customization.‐
3. The Aircraft Performance Database includes the Engine model, Aerodynamic model, and
Performance model. The airline cannot modify this database.
4. Each FMGEC contains element stored by the flight crew that enable them to generate 20
waypoints, 10 runways, 20 navaids and 5 routes.
5. The Magnetic Variation database.
MULTIPURPOSE CONTROL AND DISPLAY UNIT (MCDU)
Applicable to: ALL
Three MCDUs are installed on the pedestal for flight crew loading and the display of data.
The use of the MCDU enables the flight crew to interface with the FMGEC via selection of a flight
plan for lateral and vertical trajectories and speed profiles. The flight crew may also modify selected
　
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