As I read it....Geoffers and Fareastdriver have arrived at two different causes already.
Both very experienced Pilots and professionals and each has carefully considered a lot of information about this.
We have had a lot of good discussion by some very sharp folks....but yet there is ambiguity when it comes to the actual mechanism of these two failures.....which I am not sure even AH really knows what is causing the failures.
Which is it.....wrong material that does not afford reasonable detection of a pending failure as Geoffer's Engineer buddies are saying or is it the Orbital Gear cannot contain a failing Planetary Gear as suggested by Fareastdriver?.
Or....is it something altogether different?
Is this apparent contradiction indicative of the problem confronting the Helicopter Industry, Operators, and Customers?
AH and the Authorities in conjunction with the Accident Investigators seem not to be able to explain this situation to the degree there is conformity of thought as to the actual root cause?
Until there is a definitive....proven....without any doubt....explanation....should the aircraft be certified by any authority as being safe for flight in general air transport operations carrying passengers?
Last edited by SASless; 26th Jul 2017 at 00:32.