What happened
The pilot reported smelling and observing smoke inside the cockpit as he approached Cordova. In response, he reduced power and initiated a modified approach toward Runway 9, which was the closest runway to his current position. When the pilot attempted to add power during the maneuver, the engine failed to respond. Unable to reach the runway, he turned and executed an emergency landing on a nearby road.
The investigation
Post-accident examination revealed that the oil line connected to the input side of the oil cooler was worn and leaking. This failure allowed oil to escape and spray directly onto the engine components. Investigators found stains on the exhaust system, confirming that fluid had burned upon contact with the hot surfaces.
Findings
The pilot was uncertain about the duration for which the engine had been throttled before adding power. He also did not recall whether he had applied carburetor heat when turning toward the airport. The weather conditions at the time included a temperature of 40 degrees Fahrenheit and a dew point of 34 degrees Fahrenheit.
Safety message
Regular inspection of oil lines and cooler connections is critical to prevent leaks that can lead to fire hazards or engine failure due to oil contamination on hot components.