Incident Details
Shortly after departure, the pilot noted that the engine began losing power but continued operating. He described the engine output as barely above idle. Passengers onboard similarly reported that the engine did not sputter and ran smoothly at reduced power. The pilot attempted to restore full power but was unsuccessful, prompting a forced landing at a nearby golf course.
Landing and Damage
Due to the presence of golfers on the fairways, the pilot could not land on the fairway itself. Instead, the aircraft touched down in rough terrain and subsequently went through a ravine. This resulted in substantial damage to the aircraft.
Examination
Post-incident examination of the aircraft showed that all four fuel tanks contained fuel before the impact. The fuel lines between the tanks and the engine-driven fuel pump were checked and found intact with no leaks. The electric boost pump functioned normally, indicating proper fuel pressure. The engine-driven fuel pump underwent bench testing and operated within specifications. A test run of the engine also showed it operating within normal parameters.
No probable cause was determined.