Fuel Selector Misconfiguration Leads to Engine Power Loss and Forced Landing (N3804B)

Incident Overview and Fuel Status Reports A flight instructor reported that both main fuel tanks were one-quarter full and the auxiliary tank was three-quarters full after completing a flight. During refueling, the pilot only filled the left main tank. The pilot and a passenger then departed on a local flight. ## Engine Power Loss and Emergency After approximately one hour of flight time, the pilot transmitted on the UNICOM frequency that the engine had lost power. Several seconds later, the pilot reported that the engine had regained power momentarily before quitting again. The pilot then attempted a forced landing to the airport runway. ## Accident Sequence and Post-Accident Findings During the forced landing attempt, the aircraft struck a tree, nosed over, and impacted several other trees. Post-accident investigation revealed that the fuel selector was set to the right tank. The right tank contained only 9 ounces of fuel, while 12.5 gallons remained in the left tank and 7.5 gallons in the auxiliary tank. ## Engine and System Testing The engine was placed on a test stand with all original components. It started and ran with no noticeable deficiencies. The electrical boost pump also operated correctly when tested. ## Pilot Experience This was the pilot's second flight as a pilot-in-command in this type and model of airplane.