Originally Posted by
ferry pilot
The similarity to the Electra accidents increases when you consider the tail rotor drive shaft.
Tail boom movement could induce exactly the same condition in the tail rotor as the Electra propeller reduction gearbox oscillation. Combined with rotor bounce mirroring the wing flex
the possibility of this being the cause of the helicopter accident cannot be discounted.
I think the 63 years of service and 37 million fleet hours tends to discount that?