Incident Overview
Shortly after takeoff, the engine lost power. The pilot reversed course and applied carburetor heat. Failing to restore engine power and with little altitude remaining, the pilot executed a forced landing in a snow field, during which the airplane nosed over.
Preflight and Takeoff
During the preflight inspection, the pilot found no water or contaminants in the fuel sumps. No irregularities were noted during the pretakeoff engine run. Full power was attained during the takeoff roll, and engine performance was typical for the conditions.
Pilot Statement
The pilot told an FAA inspector that ice may have formed in the carburetor.
Weather Conditions
At the time of the accident, the temperature at Hayden, Colorado (located 18 miles west of the accident site) was 25 degrees Fahrenheit, with a dew point of 12 degrees Fahrenheit. According to the Icing Probability Chart, these conditions are not conducive to carburetor icing.
Post-Accident Engine Test
The engine was later functionally tested. During the test, the temperature was 24 degrees Fahrenheit and the dew point was 20 degrees Fahrenheit. The engine operated satisfactorily. After the engine was shut down, thick frost was noted on the carburetor housing. According to the Icing Probability Chart, these conditions are conducive to carburetor icing at cruise power and during a glide.