Preflight and Takeoff
A preflight inspection, engine start, and engine run-up were completed normally. The aircraft then departed from Runway 4. Following takeoff, the engine began to lose revolutions per minute (RPM) gradually.
Pilot Observations
The pilot reported that there were no mechanical malfunctions. Engine oil pressure and fuel pressure remained normal, and the fuel pump was engaged during the event.
Carburetor Ice Considerations
The owner's handbook for the airplane emphasizes the importance of ensuring that carburetor ice has not accumulated during taxi prior to takeoff. Icing probability charts indicate that the probability of carburetor icing at glide power was rated as serious.
Weather Conditions
At the time of the incident, the temperature was 80 degrees Fahrenheit, the dew point was 68 degrees Fahrenheit, and the relative humidity was approximately 68 percent.