NTSB

The pilot’s failure to lower the landing gear. The pilot’s attention being diverted, and his failure to use the checklist were factors.

Water contamination of the fuel system that was not caught during the preflight inspection.

The failure of the left wing’s lift strut, which resulted in the separation of the wing, and the subsequent airplane control not being possible.

The pilot’s failure to select suitable terrain for landing.

A loss of engine power due to engine inlet icing.

The loss of engine power while climbing due to the pilot’s failure to refuel the airplane prior to fuel exhaustion.

The pilot’s failure to maintain clearance from wires during an instrument takeoff attempt.

The pilot’s inadequate compensation for the gusty and crosswind condition, and his failure to maintain control of the airplane during takeoff.

The pilot’s failure to maintain directional control.