Accident Sequence
The pilot estimated approximately 60 gallons of fuel onboard at departure, with more than two-thirds in the main tanks. During ground operations, the pilot switched the fuel selector valves to the auxiliary position to conserve main tank fuel. He intended to switch back to the main tanks before takeoff per the checklist but forgot.
As the airplane lifted off and the pilot reached for the landing gear handle, the left engine lost power, and the airplane snap-rolled to the left. Witnesses reported that the airplane impacted the ground on its left wing and cartwheeled beside the runway.
Manufacturer Bulletin
A bulletin from the aircraft manufacturer stated: "If the auxiliary tanks are selected for takeoff, it is possible for air to enter the auxiliary tank outlet, leading to power interruption."
Investigation Findings
No evidence of preimpact mechanical failure was found.