a number of airplanes have been ditched largely intact.
I can think of a DC9 that sunk intact in the ocean and has never been recovered (5000' of water)
Other planes too.
I would say that an intact ditching is quite possible of this type of plane.
It is also possible that in a few minutes the plane sank, filled with water of course and not really crushed as both sides of the metal were equal pressure.
I think it is also possible the engines remained attached to the wings.
Just look up some historical ditchings. You have the internet to do it with.