Event Details
During the approach, the pilot could not obtain a gear-down-and-locked indication for the left main landing gear. The pilot subsequently elected to land with the landing gear retracted (gear-up landing). This resulted in substantial damage to the bottom of the fuselage.
Weather and Ice Conditions
At the time of the accident, weather conditions included icing, low ceilings, and low visibility. Prior to the accident, the pilot reported accumulations of moderate ice. Following the accident, ice accumulation of up to 3 inches was found on the aircraft.
Postaccident Findings
Postaccident tests revealed that the left main landing gear down lock switch had frozen due to an accumulation of ice. The freezing of the switch prevented the pilot from obtaining a positive down-and-locked indication.