412EP MR track and Balance
Ive been having several problems with my helo. It just wont track.....it has a horrible lateral vibration in the 60kts letdown and a bit of vert in the 120kts str8 and level flt regime. Ground resonance seems to occur everywhere it has landed. The techs have done almost everything from changing the elastomeric bearings, Xmsn mounts, MR blades, tracking the TR blades. The aircraft also has an overall high frequency vibration within the airframe. Advice anyone??