NTSB

Probable Cause: The incorrect installation of the fuel pickups, which resulted in a total loss of engine power due to fuel starvation. Contributing was the lack of documentation of the airplane’s unusable fuel.

Probable Cause: A total loss of engine power due to fuel starvation. Contributing was the pilot’s decision to depart on the flight with an inoperative fuel selector valve.

Probable Cause: The pilot’s improper decision to takeoff with known damage to the wing and his failure to maintain directional control during takeoff on rough terrain.

Probable Cause: The pilot’s decision to attempt the night flight under VFR when IMC prevailed resulting in the airplane striking trees while on final approach. Contributing to the accident were the unserviceable runway lights at the destination airport.

Probable Cause: The flight instructor’s failure to maintain altitude while maneuvering to another runway after the engine cowling opened shortly after takeoff. Contributing to the accident was the failure of both the student pilot and flight instructor to conduct an adequate preflight inspection.

Probable Cause: The pilot’s failure to maintain airspeed during a drag maneuver, which resulted in an overrun and subsequent impact with terrain.