NTSB

The pilot’s inadvertent attempt to takeoff on a taxiway, rather than a runway, which resulted in a collision with a fence during takeoff.

The failure of both pilots of each glider to see and avoid one another while maneuvering, which resulted in a mid-air collision.

The airplane’s collision with a bird during initial climb, which resulted in a forced landing.

The student pilot’s failure to attain proper pitch attitude of the airplane causing it to exceed its critical angle of attack, enter an aerodynamic stall, and subsequently impact terrain, and his poor decision making and lack of experience that led him to attempt the takeoff from the road.

The pilot’s improper decision to fly the airplane at too low an altitude resulting in the airplane impacting terrain.

The student pilot’s failure to maintain control of the airplane during landing with a gusting crosswind and his failure to go around and relinquish control of the airplane when directed by the instructor pilot.

The pilot’s improper positioning of the fuel selector during takeoff, which was not in accordance with the preflight checklist and resulted in fuel starvation, a subsequent total loss of engine power, and an aerodynamic stall during an attempted forced landing.

The pilot’s failure to attain the proper touchdown point which resulted in a runway overrun and collision with trees.

The pilot’s descent into the ocean for reasons that could not be determined.