Accident Narrative
The airplane had received an oil change prior to the accident flight. The pilot reported performing an uneventful preflight inspection and preparing for departure. During taxi to the active runway, the pilot did not observe any unusual oil pressure or temperature indications.
The takeoff was uneventful. Shortly after leveling off from the initial climb, the pilot experienced engine vibration that progressively worsened. He declared an emergency with air traffic control and requested vectors back to the departure airport.
While over a residential area, the airplane's engine seized as the pilot was heading back to the airport. Believing an open field within the area of homes was attainable, the pilot selected that field and extended the landing gear. Shortly after gear extension, the airplane struck a single-family home and came to rest on the home's roof and side.
Investigation Findings
On-scene investigation revealed that the airplane's propeller oil return line had disconnected from the engine's crankcase fitting. Examination of the airplane's taxi route disclosed a trail of oil from its parking place to the point where the airplane began its takeoff roll.