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Applicable to: ALL
If the aircraft is, for any reason, far outside the normal flight envelope and reaches an abnormal attitude, the normal controls are modified and provide the PF with maximum efficiency in regaining normal attitudes. (An example of a typical reason for being far outside the normal flight envelope would be the avoidance of a mid-air collision).
The so-called "abnormal attitude" law is :
? Pitch alternate with load factor protection (without autotrim)
? Lateral direct law with yaw alternate
These laws trigger, when extreme values are reached:
? Pitch (50 ° up, 30 ° down)
? Bank (125 °)
? AOA (30 °, -10 °)
? Speed (440 kt, 60 kt)
? Mach (0.96, 0.1).
It is very unlikely that the aircraft will reach these attitudes, because fly-by-wire provides protection to ensure rapid reaction far in advance. This will minimize the effect and potential for such aerodynamic upsets.
The effectiveness of fly-by-wire architecture, and the existence of control laws, eliminate the need for upset recovery maneuvers to be trained on protected Airbus aircraft.
 

  OPERATIONAL PHILOSOPHY
FLIGHT CONTROLS
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

SIDESTICK AND TAKEOVER P/B
Applicable to: ALL
When the Pilot Flying (PF) makes an input on the sidestick, an order (an electrical signal) is sent to the fly-by-wire computer. If the Pilot Not Flying (PNF) also acts on the stick, then both signals/orders are added.
Therefore, as on any other aircraft type, PF and PNF must not act on their sidesticks at the same time. If the PNF (or Instructor) needs to take over, the PNF must press the sidestick takeover pushbutton, and announce: "I have control".
If a flight crewmember falls on a sidestick, or a mechanical failure leads to a jammed stick (there is no associate ECAM caution), the "failed" sidestick order is added to the "non failed" sidestick order.
In this case, the other not affected flight crewmember must press the sidestick takeover pushbutton for at least 40 s, in order to deactivate the "failed" sidestick.
A pilot can at any time reactivate a deactivated stick by momentarily pressing the takeover pushbutton on either stick.
In case of a "SIDE STICK FAULT" ECAM warning, due to an electrical failure, the affected sidestick order (sent to the computer) is forced to zero. This automatically deactivates the affected sidestick. This explains why there is no procedure associated with this warning.
 

  OPERATIONAL PHILOSOPHY
FLIGHT CONTROLS
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

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  OPERATIONAL PHILOSOPHY
AP / FD / ATHR
A318/A319/A320/A321
FLIGHT CREW TRAINING MANUAL 

　
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本文鏈接地址：A318/A319/A320/A321 機組訓練手冊 FCTM Flight Crew Training Manual(19)