Quote:
At 2 h 12 min 02, the PF said "I don---8217;t have any more indications", and the PNF said "we have
no valid indications". At that moment, the thrust levers were in the IDLE detent and the
engines---8217; N1---8217;s were at 55%. Around fifteen seconds later, the PF made pitch-down inputs. In
the following moments, the angle of attack decreased, the speeds became valid again and the
stall warning sounded again.
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Here it seems is the clue why pilots might be pulling on the stick.
The computer disregards info when speed is below valid value shutting down all stall warnings.
It looks like the pilots passed threshold point for the on-board systems and the computer confused them.
The computer warning caused the pilots to keep the plane in stall situation.
Possibly a situation that software designers thought could never happen?