Ohhh here we go.
Sheppey, a turn back procedure in a PC12 is indeed a dangerous procedure..... But so is flying in general.
I have personally done many a turn back in the PC12, and done properly, it is a perfectly acceptable, safe procedure. It's not exclusive to aircraft that an ex RAAF pilot has gotten into. The same procedure is taught as part of Caravan endorsements.
That 'don't turn back' mentality belongs in piston singles being flown by inexperienced pilots. Not in a single engine turboprop which is very capable of doing it.
morno