Originally Posted by GarageYears
This was not stated, except that thrust was demanded at 7 secs before impact and the engines were at 50% at impact.
My transcription from the same portion differs slightly. I heard her say that throttle increase started at impact -8 seconds, and that "50% power" was reached at impact -3 seconds--which was the moment of minimum recorded airspeed before impact.
To add a tiny bit of my armchair analysis--it appears that considerable nose up elevator was applied roughly simultaneous with the throttle push--as the speed decays much more rapidly than previously before beginning to increase. Also the tail cone and other parts being left behind on the sea wall and the video suggest very substantial nose up attitude at the moment of impact.
[edit: I see that the 50% point matter was posted while I was typing]