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The PF should not fight the sidestick, or overcontrol it. If the PF senses an overcontrol, the sidestick should be released.
AT TAKEOFF AND LANDING
The above-mentioned pitch law is not the most appropriate for takeoff and flare, because the stable flight path is not what the PF naturally expects.
Therefore, the computers automatically adapt the control laws to the flight phases:
? GROUND LAW: The control law is direct law
? FLARE LAW: The control law is a smoother direct law.
Operational Recommendation:
Takeoff and landing maneuvers are naturally achieved. For example, a flare requires the PF to apply permanent aft pressure on the sidestick, in order to achieve a progressive flare. Whereas, derotation consists of smoothly flying the nosegear down, by applying slight aft pressure on the sidestick.
 
OPERATIONAL PHILOSOPHY
FLIGHT CONTROLS
 
LATERAL CHARACTERISTICS
NORMAL CONDITIONS
When the PF performs a lateral input on the sidestick, a roll rate is ordered and naturally obtained.
Therefore, at a bank angle of less than 33 °, with no input on the sidestick, a zero roll rate is ordered, and the current bank angle is maintained. Consequently, the aircraft is laterally stable, and no aileron trim is required.
However, lateral law is also a mixture of roll and yaw demand with: ‐ Automatic turn coordination
‐ Automatic yaw damping
‐ Initial yaw damper response to a major aircraft assymetry.
In addition, if the bank angle is less than 33 °, pitch compensation is provided.
If the bank angle is greater than 33 °, spiral stability is reintroduced and pitch compensation is no longer available. This is because, in normal situations, there is no operational reason to fly with such high bank angles for a long period of time.
AIRBUS LATERAL CHARACTERISTIC
 
Operational Recommendation:
During a normal turn (bank angle less than 33 °), in level flight:
? The PF moves the sidestick laterally (the more the sidestick is moved laterally, the greater the resulting roll rate - e.g. 15 °/s at max deflection)
? It is not necessary to make a pitch correction
? It is not necessary to use the rudder.
 
OPERATIONAL PHILOSOPHY
FLIGHT CONTROLS
 

 
In the case of steep turns (bank angle greater than 33 °), the PF must apply:
? Lateral pressure on the sidestick to maintain bank
? Aft pressure on the sidestick to maintain level flight.
ENGINE FAILURE
In flight, if an engine failure occurs, and no input is applied on the sidestick, lateral normal law controls the natural tendency of the aircraft to roll and yaw.
If no input is applied on the sidestick, the aircraft will reach an approximate 5 ° constant bank angle, a constant sideslip, and a slowly-diverging heading rate.
The lateral behavior of aircraft is safe.
　
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本文鏈接地址：A330/A340 機組訓練手冊 FCTM Flight Crew Training Manual 1(6)