Originally Posted by
AW009
Running engines and running tail rotor must in principle not be a proof that the Epicyclic modules suffered no self-destruction. This seems to me as a very weak argumentation because the two engine drive shafts and the tail rotor drive shaft are below the bevel gear and the epicyclic gears, see https://www.youtube.com/watch?v=UnpvtFQowKc
There will presumably be a weak point that would likely shear or at least be severely damaged in the event of a sudden stoppage of the epicyclic. Personally I have no idea where that might be but it seems AH do, and they think it is between the engines and the bevel gear.