Witness Account
According to a witness, after takeoff from runway 01, the airplane made a quick climbing turn. The nose pitched up 80 degrees, the left wing dropped down, the nose then pitched down, and the airplane was heard colliding with the ground.
Aircraft Examination
Examination of the airframe, flight controls, engine assembly, and accessories revealed no anomalies. The flaps were found extended 10 degrees.
Flight Characteristics
The gross weight power-off stalling speed with full flaps in the Super Cub 150 is 43 M.P.H.; with flaps up the stalling speed increases about 4 M.P.H. Review of the Piper Flight Test Manual for the PA-18-150 did not note any test data that was conducted with 10 degrees of flaps.
Toxicology Findings
Tetrahydrocannabinol (Marihuana) 0.004 (ug/ml, ug/g) was detected in the blood. An unspecified amount of Tetrahydrocannabinol carboxylic acid (Marihuana) was detected in the blood. Tetrahydrocannabinol carboxylic acid (Marihuana) 0.0106 (ug/ml, ug/g) was detected in the liver.