Cessna P210N N731NR accident near Saint Louis, Missouri

Probable cause

The pilot's failure to extend the landing gear or check that it was in the down position before landing.

NTSB analysis

While on left base of the traffic pattern, an air traffic controller instructed the pilot to make a "short approach" to avoid traffic. The pilot reported that he lowered the landing gear handle but that he was unsure if the landing gear down indicator light had illuminated, and he did not remember visually verifying that the gear was down during the approach. The pilot stated that, during the approach, he was distracted by an odd smell in the cockpit, which he thought may have been the air conditioner malfunctioning. The airplane touched down on the runway surface with the landing gear retracted. Examination of the landing gear system revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. Therefore, it is likely that the pilot was distracted by the odor in the cockpit and did not lower the landing gear or check that it was in the down position before landing.

Text from the NTSB. Open the NTSB docket for CEN13LA252 for the full record.