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Thread: TOM stall?
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Old 22nd May 2009, 08:54
  #138 (permalink)  
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Join Date: Aug 1998
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The Boeing procedure for the "approach to stall recovery" - that is, when the stick shaker goes off at very low airspeed - is simply to leave the autopilot engaged and increase the thrust. At low level (as on approach) jet engines have a great deal of excess thrust, and the aircraft will simply motor out of the low speed condition.

The point being that grabbing the controls, disconnecting the autopilot, and attempting to manually fly (and the autopilot is automatically disconnected if you hit TOGA for a go-around) is the wrong thing to do especially if a startled pilot is still struggling to regain situational awareness. For this accident, or the Turkish at Schiphol, all the pilots had to do to save the situation was shove the thrust levers up.

I flew several of these very scenarios, from very low speeds indeed, in various configurations in the sim just four days ago with no problems.

(Note: The Boeing procedure also states that the autopilot should be disconnected if the performance is inadequate.)
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