NTSB

The pilot’s exceedance of the airplane’s critical angle of attack during takeoff as he attempted to avoid power lines, which resulted in an aerodynamic stall.

An inflight loss of control on landing approach due to encountering a down-draft, and the pilot’s failure to take timely action to abandon the approach and perform a go-around.

The pilot’s failure to maintain directional control during landing on a snow- and ice-covered runway, which resulted in impact with a snowbank and a nose-over.

The pilot’s distraction while looking for other aircraft in the traffic pattern, which resulted in his failure to follow a prelanding checklist and to extend the landing gear before landing. Contributing to the accident was the improperly rigged landing gear warning switch, which prevented an audible warning sound.

The partial loss of engine power due to the accumulation of carburetor ice, which resulted in a forced landing on rough terrain.

The pilot’s failure to maintain directional control during the landing roll, which resulted in impact with a windsock pole.

The pilot’s distraction due to a spray handle opening and his improper pitch trim setting during final approach, which resulted in an excessive pitchdown when he took his hand off the controls to close the handle.

The loss of engine power for reasons that could not be determined because postaccident engine examination and testing revealed no preimpact mechanical malfunctions or failures that would have precluded normal operation.

Fuel starvation to the left engine and the resulting loss of engine power to that engine, and a loss of airplane control due to the pilot’s failure to maintain the minimum controllable airspeed.