NTSB

Probable cause: The pilot’s incorrect brake application during the landing roll, resulting in a nose over.

Probable cause: The student pilot’s improper landing flare in gusting crosswind conditions, which resulted in a hard, bounced landing.

Probable cause: The pilot’s failure to maintain airplane control during the approach and his delayed decision to go around.

Probable cause: The pilot’s failure to maintain clearance from a stationary helicopter during landing. Contributing to the accident was the ground crew’s failure to ensure that the helicopter would clear the stationary helicopter.

Probable cause: A collapse of the right main landing gear during the landing roll because the gear would not lock into place. Contributing to the accident was the pilot’s failure to perform the alternate landing gear extension procedure before landing.

Probable cause: The student pilot and flight instructor’s failure to see and avoid powerlines during a simulated emergency landing, which resulted in a wire strike during a go-around.

Probable cause: Maintenance personnel’s failure to properly secure the tail rotor drive shaft cover, which resulted in the cover departing the helicopter in flight.

Probable cause: The pilot’s failure to maintain directional control and her use of excessive braking during landing, which resulted in a nose-over.

Probable cause: The pilot’s inability to maintain the landing flare, which resulted in the airplane landing hard short of the runway. Contributing to the accident was the cockpit canopy opening in flight.