NTSB

Probable cause: The ground vehicle driver’s decision to drive on an active taxiway at night and failure to yield to taxiing aircraft, resulting in a collision with a taxiing aircraft.

Probable cause: The pilot’s inadequate preflight fuel planning and in-flight fuel monitoring and his decision to take off with an unverified amount of fuel, which resulted in fuel exhaustion and a subsequent impact with trees during an attempted forced landing.

Probable cause: The total loss of engine power for reasons that could not be determined.

Probable cause: The student pilot’s failure to maintain directional control during landing.

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.