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‐ Bank angle > 125 °
‐ Angle of attack > 30 ° or < -10 ° (-15 ° for A319 and A321)
‐ Speed > 440 kt or < 60 kt
‐ Mach > 0.91 or < 0.1
The law in pitch is the alternate law with no protection, except load-factor protection, and without auto
trim. In roll, it is a full-authority direct law with a yaw mechanical.
When the aircraft has recovered from its abnormal attitude, the flight control laws in effect are :
‐ In pitch : Alternate law without protection, with autotrim.
‐ In roll : Full authority direct law, with yaw alternate law.
There is no reversion to direct law, when the pilot extends the landing gear.
ABNORMAL ATTITUDE LAWS
Applicable to:
,
,
MSN,,,,
The system applies an abnormal-attitude law in pitch and roll, if the aircraft exceeds any of these
limits in flight :
‐ Pitch attitude > 50 ° nose up or 30 ° nose down
‐ Bank angle > 125 °
‐ Angle of attack > 30 ° or < -10 ° for the A320 (-15 °for the A318, A319 and A321).
‐ Speed > 440 kt or < 70 to 90 kt (depending on the aircraft pitch attitude)
‐ Mach > 0.91
The law in pitch is the alternate law with no protection, except load-factor protection, and without auto
trim. In roll, it is a full-authority direct law with a yaw mechanical.
When the aircraft has recovered from its abnormal attitude, the flight control laws in effect are :
‐ In pitch : Alternate law without protection, with autotrim.
‐ In roll : Full authority direct law, with yaw alternate law.
There is no reversion to direct law, when the pilot extends the landing gear.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - RECONFIGURATION CONTROL LAWS
A318/A319/A320/A321 FLEET DSC-27-20-20 P 9/10
FCOM 19 AUG 10
MECHANICAL BACK-UP
Applicable to: ALL
PITCH
Mechanical backup enables the pilot to control the aircraft during a temporary complete loss of
electrical power.
He does this in pitch by manually applying trim to the THS.
The PFDs display “MAN PITCH TRIM ONLY” in red.
LATERAL
The pilot uses the rudder pedals as the mechanical backup to laterally control the aircraft .
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - RECONFIGURATION CONTROL LAWS
Intentionally left blank
A318/A319/A320/A321 FLEET DSC-27-20-20 P 10/10
FCOM 19 AUG 10
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-27-20-30 P 1/28
FCOM 19 AUG 10
PEDESTAL
Applicable to:
, ,
MSN,,,,
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-27-20-30 P 2/28
FCOM 19 AUG 10
(1) RUD TRIM Rotary Switch
Controls the rudder trim actuator, which moves the neutral point of the artificial feel by the
equivalent of one degree of rudder travel per second.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A318/A319/A320/A321 FLEET DSC-27-20-30 P 3/28
FCOM 19 AUG 10
Note: The rudder trim rotary switch has no effect, when the autopilot is engaged.
(2) RESET Pushbutton
By pushing the RESET pushbutton, the zero trim position is ordered at 1.5 °/s.
Note: The RESET pushbutton is not active, when the autopilot is engaged.
(3) Position Indicator
Displays the rudder trim direction (L or R) and value (0 to 20 °).
(4) SPEEDBRAKE Lever
The lever controls :
The position ‐ of the speedbrake surfaces.
To set speedbrake surfaces to a required position, the lever has to be pushed down and set
to the required position. A “hardpoint” is provided at “½” SPEEDBRAKE position.
‐ The manual preselection of the ground spoilers.
To arm the ground spoilers, the lever must be pulled up when in the RET position.
When the lever is armed (or reverse thrust is selected), all spoiler's surfaces will
automatically extend at landing, or in case of a rejected takeoff.
(5) PITCH TRIM Wheel
Both pitch trim wheels provide mechanical control of the THS and have priority over electrical
control. A pilot action on the pitch trim wheel disconnects the autopilot.
Note: Crew action on the pitch trim wheel does not disconnect the ELACs (micro-switches,
actuated by the override mechanism, ensure that the computers remain synchronized
　
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