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3. The Aircraft Performance database includes the Engine model, Aerodynamical model, and
Performance model. The airline cannot modify this database.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_10-10 P 5/8
FCOM 19 AUG 10
4. The Magnetic Variation database.
5. Each FMGC contains elements stored by the flight crew that enable them to create 20 waypoints,
10 runways, 20 navaids, and 5 routes.
MULTIPURPOSE CONTROL AND DISPLAY UNIT (MCDU)
Applicable to:
Two MCDUs are installed on the pedestal for flight crew loading and display of data. The use of
the MCDU allows the flight crew to interface with the FMGC by selection of a flight plan for lateral
and vertical trajectories and speed profiles. The flight crew may also modify selected navigation
or performance data and specific functions of Flight Management (revised flight plan, engine-out,
secondary flight plan, etc.). Additional data from peripherals (Centralized Fault Display System
(CFDS), ARINC Communication Addressing and Reporting System (ACARS), Air Traffic Service Unit
(ATSU)...) can also be displayed. Data that is entered into the MCDU that is illogical or beyond the
aircraft capabilities will either be disregarded or will generate an advisory message.
MULTIPURPOSE CONTROL AND DISPLAY UNIT (MCDU)
Applicable to:
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Two MCDUs are installed on the pedestal for flight crew loading and display of data. The use of
the MCDU allows the flight crew to interface with the FMGC by selection of a flight plan for lateral
and vertical trajectories and speed profiles. The flight crew may also modify selected navigation
or performance data and specific functions of Flight Management (revised flight plan, engine-out,
secondary flight plan, etc.). Additional data from peripherals (Centralized Fault Display System
(CFDS), ARINC Communication Addressing and Reporting System (ACARS), Air Traffic Service Unit
(ATSU)...) can also be displayed. Data that is entered into the MCDU that is illogical or beyond the
aircraft capabilities will either be disregarded or will generate an advisory message.
The MCDUs allow the activation of the back–up navigation in the case of a dual FM Failure.
FLIGHT CONTROL UNIT (FCU)
Applicable to: ALL
The FCU located on the glareshield, is the short-term interface between the flight crew and the
FMGC. It is used to select any flight parameters or modify those selected in the MCDU. The
autopilots and autothrust functions may be engaged or disengaged. Different guidance modes can
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
AUTO FLIGHT - GENERAL
DESCRIPTION
A318/A319/A320/A321 FLEET DSC-22_10-10 P 6/8
FCOM 19 AUG 10
be selected to change various targets (speed, heading, track, altitude, flight path angle, vertical
speed).
FLIGHT AUGMENTATION COMPUTER (FAC)
Applicable to: ALL
The FAC controls rudder, rudder trim and yaw damper inputs. It computes data for the flight envelope
and speed functions. The FAC also provides warning for low-energy and windshear detection if these
functions are installed.
OTHER FLIGHT CREW INTERFACES
Applicable to: ALL
THRUST LEVERS
The thrust levers are the main interface between the Flight Management Guidance Computer
(FMGC), the Full Authority Digital Engine Control System (FADEC), and the flight crew.
The thrust levers:
Arm the autothrust at ‐ takeoff, when FLX or TOGA is selected
‐ Limit the maximum thrust by their position when autothrust is active
‐ Disconnect the autothrust system when the flight crew sets them to IDLE
‐ Command the thrust manually when autothrust is not active
‐ Engage the common modes (takeoff or go-around) when TOGA (or FLX for takeoff) is set
‐ Set the autothrust to the active mode when they are between IDLE and CL detent (MCT in
engine out).
Applicable to: ALL
ELECTRONIC FLIGHT INSTRUMENTS (EFIS)
Two Primary Flight Displays (PFD) and Navigation Displays (ND) provide the flight crew with
full-time flight guidance, navigation and system advisory information for all flight phases. An
EFIS control panel is located at each end of the glareshield and is used to control both Primary
and Navigation Displays. This panel includes controls to select various modes within the PFD.
A selector allows the barometric altimeter setting to be displayed on the PFD. Various distance
ranges can be selected on the ND, and two switches allow either the left or right VOR/ADF bearing
pointers to be displayed on the ND.
Applicable to: ALL
PRIMARY FLIGHT DISPLAYS
The PFDs combine several conventional flight instrument indications on one color display panel,
　
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