What was found
AT HOVER FOR TAKEOFF, PICKED AIRCRAFT UP TO A HOVER 2 TIMES AND BOTH TIMES AT A STEADY HOVER, AIRCRAFT OSCILLATED FORE AND AFT WITH NO PILOT INPUT (NOSE UP AND DOWN). MAINTENANCE INSPECTED SERVO INPUTS FOR WEAR, NO DEFECTS FOUND, SERVICED SERVO CONTROL ACCUMULATOR IAW THE EC-120 MM. THE GROUND RUN AND HOVER CHECK WAS GOOD. (K)