Originally Posted by
Gustosomerset
..For the lack of any other evidence I still wonder if there might have been something about the height of the departure that offers a clue to what subsequently went wrong.
Yep, I'm wondering the same thing, why so high? Doing rejected elevated heliport night takeoffs in a S76 from 60' CDP is a pretty harrowing experience on the way down. I'd be uncomfortable being needlessly exposed any higher without airspeed.