Power doesn't matter that much. Stall would be close to 100-105 KIAS.
Turn into the wind and ground speed (GS) would be 90-95 kts or less. Very survivable(see Ethiopian 767 hijack/ditching video which was at a much higher speed)
IMO if the plane had ditched, with empty tanks, it might have floated for hours. USAIR Hudson landing as an example.
But this is for a controlled ditching. There is no indication that this occurred.
Last edited by misd-agin; 25th Apr 2014 at 03:42.
Reason: ground speed (GS)