That was the first thing that came to my mind when I read that was a bad servo. I would re-check em, even brace the heli and trying the test under load also... Also back to the beginning, just make sure your swash is level, and no binding anywhere. Make sure your Bell Mixer Arm screws aren't in to tight. I like to use Tri-Flow and lubricate all moving parts, even some gun oil works great also.

But anyway, it sure sounds like a bad servo.... Be cautious as they will fool ya some times !

Good luck, keep us informed... Any pics or vid of your prob would help tremendously...


~ Jeff