NTSB

Probable cause: The pilot’s exceedance of the airplane’s critical angle of attack following a loss of the left engine power shortly after takeoff, which resulted in an aerodynamic stall at an altitude too low for recovery. Contributing to the accident was the loss of left engine power due most likely to a fuel system issue that could not be determined based on the available evidence.

Probable cause: The pilot’s improper preflight fuel planning, which resulted in fuel exhaustion and a total loss of engine power.

Probable cause: A total loss of engine power for reasons that could not be determined based on the available evidence.

Probable cause: The pilot’s failure to remove the gust lock before flight, which resulted in the airplane’s inability to rotate and a subsequent runway overrun. Contributing to the accident was the pilot’s failure to follow the preflight checklist.

Probable cause: The pilot’s improper decision to fly with an air cast boot on his foot, which led him to rely on the passenger to apply brakes and rudder, which was performed improperly and led to a loss of directional control.

Probable cause: The pilot’s decision to perform a low-level maneuver at an altitude where he was unable to recover the airplane before impacting terrain.

Probable cause: The mechanic’s failure to properly secure the air reference line, which resulted in a loss of engine power.

Probable cause: The pilot’s failure to follow the air traffic controller’s instructions and his subsequent failure to maintain adequate lookout to see and avoid the other airplane on the taxiway. 

Probable cause: The pilot’s delay in applying carburetor heat, which resulted in a total loss of engine power during descent due to carburetor icing.