Originally Posted by J_skaggs
I checked the tail shaft by twisting it and it seemed OK. If The parts are available, I may just replace the feathering shaft, main shaft and tail assembly. It must be one of those as I have replaced everything else that can cause vibs.
I called HH. The CS rep said they have observed vibration is a number of heli's they tested before release. He said they don't have any idea what causes it at this time. He could be blowing smoke.
Hmmm, not happy to hear that. I 'm sure you balanced your blades?