Cox Clyde H Fshr Aero Vsns Clbty near Tampa, FL — 2008-09-25

Probable cause

The pilot’s failure to maintain control of the airplane during takeoff due to inadequate maintenance.

NTSB narrative

According to a witness, a slight gust of wind came across the airfield during takeoff. He stated that the airplane was two to three feet off the ground when the left wing dipped, hit the runway, and caused the airplane to cartwheel several times. According to an Airframe and Powerplant (A&P) mechanic, the pilot was anxious to take his aircraft so he started adjusting the tension on the flying wire cables himself. The cables on the left wing remained loose even after adjusting the turnbuckles. The A&P recommended to the pilot that the cables be cut and re-swaged to which the pilot declined. On the day of the accident, the pilot taxied his airplane away from A&P’s property, without having any of the discrepancies corrected. Examination of the airplane by a Federal Aviation Administration inspector found that the pilot preferred to do his own maintenance, and that an annual inspection was not completed on the airplane. He found that the left wing's flying wires were not attached properly to the main frame, which was evidenced by the oblong fitting coupled with the bare metal on the main frame bracket showing that the assembly pulled apart from the fuselage before or just prior to takeoff.

NTSB coding

• Dragged wing/rotor/float/other · Initial climb
• Maintenance