ORIGINAL: RICMOD5634
In the original post he said it happened in the air and while taking of. I'd go back to a vibration problem in either the RX or servo.
Rich
The strange thing about that is, it only happened twice after 40+ flights that seemed to be an intermittent issue and couldn't be duplicated. Holding the plane nose up while the motor is running, with TX and plane in hand is when it happens the most often.
Yea, weird I know!
It could be everything suggested all in one shot. I brought a "Challenge" didn't I? [:@]