Dimbleby,
Whilst I agree with you that the PT6A is one of the most reliable turbine engines. They can and do fail, as happened to me about 14 years ago. The engine broke up and I was very happy to be overland and with the luxury of another 3 strapped onto the wings!
cldrvr has in fact made some very sensible and useful observations. Single engine operations over such an expanse of water is nothing short of barking mad.
