Flight Details
The pilot-in-command (PIC) placed a refueling order to fill the aircraft's two 210-gallon main tanks for a return flight to Toronto, Ontario, Canada. After the cargo was unloaded and the aircraft was refueled, the aircrew prepared for departure.
Refueling and Takeoff Attempts
Two takeoff attempts were aborted due to slow aircraft performance. Engine run-ups were performed after each abort and reportedly checked normal. Following the second aborted takeoff, the aircrew contacted the fixed-base operator (FBO) and requested that the refueler be asked what type of fuel was added. The response was '100LL avgas.'
Accident Sequence
On the third attempt to depart, the aircraft took off, but both engines lost power as the landing gear was retracted. The aircrew selected a highway for an emergency landing. During the landing, the left wing struck a utility pole, then the aircraft went through a fence and impacted a highway embankment.
Investigation Findings
Investigation revealed that Jet-A fuel had been added to the aircraft rather than the requested 100LL fuel. The truck containing Jet-A fuel looked similar to the one with 100LL avgas but was properly designated with fuel grade markings.