Accident Overview
During final approach, the pilot observed that the aircraft would touch down short of the runway and added power. The engine did not respond to the throttle movement. The airplane subsequently landed approximately 500 feet short of the runway in a muddy area and flipped over.
Post-Accident Examination
Following the accident, the engine was run on the aircraft and no discrepancies were noted.
Weather Conditions
At a location 20 miles to the east, the temperature was recorded as 43°F and the dewpoint as 32°F. According to the FAA carburetor icing chart, this temperature and dewpoint combination was conducive to serious carburetor icing.
Pilot Interview
When interviewed, the pilot stated that he used carburetor heat on approach; however, he was not aware of the temperature and dewpoint spread.