A following report states that at least one of the occupants had some serious spinal compression injuries, not a typical indication of a smooth landing.
I am thinking that the Grand has a dual channel FADEC for each engine, what are the chances of a dual engine failure in the P&W-207s?
From an Italian helicopter site the 109 just lost power while on the final approach to land and ended up in the water about 1500' from the coast.
The occupants were in the water less than 1hr but they still showed signs of hypothermia.
This particular program has had two other serious accidents in the recent past, one of which was caused by CFIT at night with four fatalities.
To notice, this emergency ditching was at night as well, I'll try to find out whether it was the oncoming night crew or the outgoing day crew.
Crew fatigue and extended duty time may have been a factor.
As far as the seven minutes afloat, given the injuries received by some of the occupants, the floats may have been ripped by the impact (if they inlated at all).