LONG BEACH, CA, USA
N6126S
FARRINGTON 18A
THE CERTIFICATED ATP PILOT STATED THAT HE HAD COMPLETED A NORMAL CHECKLIST. HE STATED THERE WAS A NORMAL SPIN UP ON THE RUNWAY AND ROTOR RPM WAS ATTAINED WITH NO SIGN OF GROUND RESONANCE. EVERYTHING WAS NORMAL ON TAKEOFF RUN TO 30 KNOTS. AT 31 KNOTS THE PILOT PROCEEDED TO PREPOSITION STICK TO THE LEFT AND PUSH LIFT BUTTON. THE AIRCRAFT ENCOUNTERED VIOLENT GROUND RESONANCE SIMULTANEOUSLY AT LIFT OFF. GYROPLANE CONTINUED SHAKING VIOLENTLY AND SWERVED TO THE LEFT COLLIDING WITH THE GROUND. THE PILOT STATED TO THE FAA HE WAS UNSURE WHETHER OR NOT HE HAD ACTUALLY PRESSED THE ENGAGE SWITCH OR THAT HE HAD BECOME AIRBORNE.
GROUND RESONANCE REMEDIAL ACTION NOT PERFORMED BY THE PILOT.
Source: NTSB Aviation Accident Database
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