Accident Overview
The operator had applied for an on-demand/air taxi certificate but had not obtained approval. The flight was intended to carry canceled checks. After leveling off, the pilot elected to use the remaining fuel from the inboard tanks.
Pilot Actions
The pilot stated that soon after selecting the inboard tanks, the left engine began running rough. He then selected the outboard main tank on the left side with the boost pump on, but "nothing happened." He then positioned the left fuel selector back to the inboard tank, and normal engine operation returned momentarily. An identical scenario occurred on the right side. After a dual power loss, the pilot tried to return to the departure airport but was unable. He landed in a field, but the aircraft struck trees before stopping.
Examination Findings
An examination of the aircraft revealed that the inboard tanks were empty, but the outboard tanks were full of fuel. The position of the fuel selectors when the engines lost power was not determined. No preimpact part failure or malfunction was found.
Fuel Selector Panel
The fuel selector panel was located on the floor between the pilot and copilot seats. Due to re-upholstering of the seats, the pilot could not see the panel unless he pulled the seat cushions apart.