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maneuvers and exceedance of the safe envelope in pitch and roll axis.
However, as on conventional aircraft, the rudder has no such protection.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - GENERAL
A318/A319/A320/A321 FLEET DSC-27-10-10 P 2/4
FCOM 19 AUG 10
CONTROL SURFACES
Applicable to: ALL
The flight controls are electrically or mechanically controlled as follows :
PITCH AXIS
Elevator = Electrical
Stabilizer = Electrical for normal or alternate control. Mechanical for manual trim control
ROLL AXIS
Ailerons = Electrical
Spoilers = Electrical
YAW AXIS
Rudder = Mechanical, however control for yaw damping, turn coordination and trim is
electrical.
SPEED BRAKES
Speed
brakes
= Electrical
Note: All surfaces are hydraulically actuated.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - GENERAL
A318/A319/A320/A321 FLEET DSC-27-10-10 P 3/4
FCOM 19 AUG 10
COCKPIT CONTROLS
Applicable to: ALL
Each pilot has a sidestick controller with which to exercise manual control ‐ of pitch and roll. These
are on their respective lateral consoles.
The two sidestick controllers are not coupled mechanically, and they send separate sets of signals
to the flight control computers.
‐ Two pairs of pedals, which are rigidly interconnected, give the pilot mechanical control of the
rudder.
‐ The pilots control speed brakes with a lever on the center pedestal.
‐ The pilots use mechanically interconnected handwheels on each side of the center pedestal to
control the trimmable horizontal stabilizer.
‐ The pilots use a single switch on the center pedestal to set the rudder trim.
‐ There is no manual switch for trimming the ailerons.
COMPUTERS
Applicable to: ALL
Seven flight control computers process pilot and autopilot inputs according to normal, alternate, or
direct flight control laws.
The computers are :
2 ELACs
(Elevator Aileron Computer)
For : Normal elevator and stabilizer control.
Aileron control.
3 SECs
(Spoilers Elevator Computer)
For : Spoilers control.
Standby elevator and stabilizer control.
2 FACs
(Flight Augmentation Computer)
For : Electrical rudder control.
IN ADDITION 2 FCDC
Flight Control Data Concentrators (FCDC) acquire data from the ELACs and SECs and send it to
the electronic instrument system (EIS) and the centralized fault display system (CFDS).
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - GENERAL
A318/A319/A320/A321 FLEET DSC-27-10-10 P 4/4
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - ARCHITECTURE
A318/A319/A320/A321 FLEET DSC-27-10-20 P 1/22
FCOM 19 AUG 10
GENERAL ARCHITECTURE
Applicable to:
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - ARCHITECTURE
A318/A319/A320/A321 FLEET DSC-27-10-20 P 2/22
FCOM 19 AUG 10
GENERAL ARCHITECTURE
Applicable to:
,
,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
GENERAL - ARCHITECTURE
A318/A319/A320/A321 FLEET DSC-27-10-20 P 3/22
FCOM 19 AUG 10
PITCH CONTROL
Applicable to: ALL
GENERAL
Two elevators and the Trimmable Horizontal Stabilizer (THS) control the aircraft in pitch. The
maximum elevator deflection is 30 ° nose up, and 17 ° nose down. The maximum THS deflection
is 13.5 ° nose up, and 4 ° nose down.
ELECTRICAL CONTROL
In normal operations, ELAC2 controls the elevators and ‐ the horizontal stabilizer, and the green
and yellow hydraulic jacks drive the left and right elevator surfaces respectively.
The THS is driven by N° 1 of three electric motors.
If a failure occurs in ELAC2, or in the associated hydraulic ‐ systems, or with the hydraulic
jacks, the system shifts pitch control to ELAC1. ELAC1 then controls the elevators via the blue
hydraulic jacks and controls the THS via the N° 2 electric motor.
‐ If neither ELAC1 nor ELAC2 is available, the system shifts pitch control either to SEC1 or to
SEC2, (depending on the status of the associated circuits), and to THS motor N° 2 or N° 3.
In case of failure, the actuators are reconfigured, Refer to DSC-27-10-20-A PITCH CONTROL -
SCHEMATIC.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
　
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