NTSB

The pilot’s poor in-flight weather evaluation, which resulted in flight into a level 6 thunderstorm.

The pilot’s failure to maintain an adequate terrain clearance altitude and his failure to maintain an adequate airspeed while maneuvering to reverse course in a box canyon.

A total failure during landing roll of the right brake caused by severely worn shoes.

The pilot’s failure to maintain aircraft control.

The pilot’s misjudgment of distance and altitude during a night approach for landing, resulting in a collision with wires and the ground.

The pilot’s improper fuel management during the landing approach, resulting in a loss of engine power due to fuel starvation, and a forced off-airport landing.

A failure of the crankshaft idler gear, which resulted in a total loss of engine power while maneuvering.

The failure to use carburetor heat in cruise flight.