The lateral roll on entering the water
There have been a number of posts talking about whether or not the gearbox will come forward with blade impact. This same topic came up on a news group a while back, particularly in relation to Robinsons. This was especially pertinent because the flight manual says roll left while the various mathmatical types on the NG suggested this would force the gear box forward into the cabin.
I wrote to Robinson for clarification and one of their engineers wrote back and said that there was no likelihood of the MR Gbx coming forward as the blades were shown to disintegrate first. The roll to the left was to make sure the pilots door was uppermost to make egress easier.