Accident Details
Shortly after takeoff, witnesses observed the aircraft flying low over trees. It subsequently performed a rapid roll to the left and collided with wooded terrain. One witness reported seeing gray smoke trailing the left engine before the impact.
Investigation Findings
Inspection of the wreckage revealed that the left engine spark plugs were black and heavily sooted. Neither propeller had been feathered prior to the accident, and the landing gear was found in the extended position. Further investigation determined that Cessna multi-engine service bulletin (SB) 88-3 had not been complied with. This bulletin modifies the fuel system to allow direct pilot actuation of the auxiliary fuel pump output pressure, rather than automatic actuation. Both engines ran satisfactorily when tested on a test stand after the accident. No other evidence of mechanical failure or malfunction was found. All three occupants were killed.
Probable Cause
The probable cause of the accident, as determined by the official investigation, was the failure of the pilot to perform the correct emergency procedures when confronted with a loss of engine power, and his failure to maintain minimum control speed (VMC), which resulted in a loss of aircraft control.