Incident Summary
A pilot reported experiencing a loss of engine power while flying at 3,000 feet, after descending from 6,500 feet. Approximately 35 miles from the intended destination, the pilot reduced power and applied carburetor heat. Upon leveling off, the engine rpm stabilized between 1,800 and 2,000 rpm. Suspecting carburetor ice, the pilot applied carburetor heat again, but full power was not restored.
Diversion and Landing Attempt
The pilot diverted to a nearby airport and entered the traffic pattern for the northern runway. During the landing sequence, the pilot realized the aircraft would land long. Power was applied for a go-around, but the engine only accelerated to 1,500–1,600 rpm. While maneuvering in a left turn to avoid trees, the airplane stalled, entered a descent, and impacted a house.
Carburetor Icing Conditions
According to the carburetor icing chart, the reported temperatures at the time were conducive to serious carburetor icing. The Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25A) notes that a decrease in engine rpm is the first indication of carburetor ice in an airplane with a fixed-pitch propeller. It further states that when conditions are favorable for carburetor icing, carburetor heat should be applied immediately and left on until all ice is removed. Applying partial heat or insufficient time may worsen the situation.
Postaccident Examination
Postaccident examination of the airframe and engine revealed no preimpact mechanical malfunctions or failures that would have precluded normal operation.