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Old 28th May 2011, 22:48
  #33 (permalink)  
DozyWannabe
 
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Originally Posted by p51guy
Oh, that's right, an airbus cannot stall in normal law but can it hit the ground?
Yes, this has been common knowledge for longer than the A320 has been in line service - because this feature of the protections was sadly demonstrated at the Habsheim-Mulhouse airshow, when the PF, having permanently disabled autothrust, tried to pull back on the stick before the engines had spooled up. From his point of view, the aircraft was not responding to his inputs and this was the germ of the "Airbus FBW overrides pilot inputs" complaints that are constantly repeated by his supporters. What tends to be excluded in those complaints - and is something that the PF never draws attention to - is the fact that having irreversibly disconnected throttle control from the computers, his inputs would have caused an unprotected aircraft to stall and fall to the ground in an uncontrolled fashion, with the likelihood that the death toll would have been significantly higher.

Returning to the topic at hand, I think Airbus are doing the right thing by emphatically stating that if you have stalled the aircraft and have altitude to spare the correct action is to get the nose down as soon as possible. This becomes extra important if you have bad airspeed data, because in that situation the stall protections cannot work.
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