NTSB

Probable cause: The pilot’s failure to maintain adequate airspeed while maneuvering in high winds, which resulted in the airplane exceeding its critical angle of attack and an aerodynamic stall. Contributing to the accident was the pilot’s improper decision to load the airplane beyond its allowable gross weight and center of gravity limits.

Probable cause: The pilot’s selection of a threaded metal rod of insufficient strength to connect the fuel tank selector handle to the fuel valve, which resulted in his inability to switch fuel tanks and a subsequent total loss of engine power due to fuel starvation.

Probable cause: The total loss of engine power due to fuel starvation.

Probable cause: A partial loss of engine power due to the formation of carburetor icing, which resulted from the student pilot’s failure to apply carburetor heat and the flight instructor’s delayed response in applying carburetor heat while operating in conditions conducive to carburetor icing.

Probable cause: The pilot’s delayed application of rudder and failure to maintain directional control during takeoff.

Probable cause: The pilot’s failure to maintain control of the airplane while flying at a low altitude, which resulted in the airplane exceeding the critical angle of attack and a subsequent aerodynamic stall.

Probable cause: The pilot’s failure to maintain a proper airspeed and his exceedance of the airplane’s critical angle of attack, which resulted in an aerodynamic stall.

Probable cause: The pilot’s failure to maintain a proper approach speed, which resulted in in a hard landing and a runway excursion. Contributing to the accident was the pilot’s decision to fly the airplane without an instructor onboard.

Probable cause: The pilot’s selection of an unsuitable landing area, which resulted in the airplane impacting wheat stalks and a subsequent nose-over.