There was a F-27 accident following an engine failure in Canada years ago in which, I seem to recall, one factor noted was that the well intentioned action of the cabin crew of moving all the pax to the rear of the cabin in anticipation of a forced landing put the aircraft out of the C of G envelope to the rear. This may have contributed to the loss of control - The crew were presented with a very difficult situation due to knock on effects of the initial engine failure and the movement of the pax was mentioned as a factor.
Quebecair Flight 255 - Wikipedia, the free encyclopedia