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Old 14th Dec 2011, 03:17
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Machinbird
 
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AF447 Roll Oscillation & PF's control inputs.

Originally Posted by OC
I must confess a certain scepticism about such a suggestion. It suggests, to my mind, an unfamiliarity with the controls worthy of a tyro which whatever his reactions I don't think we can claim the PF to be. One shouldn't get too wrapped up in trying to find a mechanical explanation (red herring fillets). Rather there should be more examination of the psychological elements of this accident.
OC, So what are your thoughts about the following definition?
Pilot-induced oscillations, as defined by MIL-HDBK-1797A,[1] are sustained or uncontrollable oscillations resulting from efforts of the pilot to control the aircraft and occurs when the pilot of an aircraft inadvertently commands an often increasing series of corrections in opposite directions, each an attempt to cover the aircraft's reaction to the previous input with an overcorrection in the opposite direction.
Do only tyros experience PIO? Was the aircraft's sustained roll oscillation before the stall a PIO? Had PF ever flown in Alt 2 Law at altitude?
Why would a somewhat experienced pilot be unable to fly smoothly?
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