NTSB

Probable cause: The pilot’s improper decision to perform a steep turn at low altitude, which resulted in exceedance of the airplane’s critical angle of attack and an aerodynamic stall.

Probable cause: The pilot’s uncoordinated flight control inputs and subsequent inadvertent cross-control aerodynamic stall in the airport traffic pattern that resulted in a loss of control and uncontrolled descent with insufficient altitude for recovery.

Probable cause: The airplane’s encounter with unforecast icing conditions, which led to structural icing that obscured the pilot’s vision, an aerodynamic stall, and a subsequent hard landing.

Probable cause: The pilot’s failure to see and avoid power lines while flying at low altitude.

Probable cause: The pilot’s loss of vision during cruise flight, which resulted in a loss of aircraft control. Contributing to the accident was the pilot’s decision to fly with a known medical condition.

Probable cause: The pilot’s improper decision to land on a snow-covered airstrip with a tundra tire-equipped airplane, which resulted in a nose-over.

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

Probable cause: A failure of the right fuel tank to supply fuel to the engine for reasons that could not be determined, which resulted in a total loss of engine power due to fuel starvation.

Probable cause: The pilot’s controlled flight into mountainous terrain while attempting to operate under visual flight rules in instrument meteorological conditions (IMC).