Accident Description
An airline transport rated pilot and a passenger departed on a cross-country business flight in a twin-engine, turbo-propeller-equipped airplane. The flight occurred during day visual meteorological conditions. Shortly after takeoff, the airplane banked left, descended, and impacted terrain approximately half a mile from the end of the runway. There was no post-crash fire, and fuel was present at the accident site.
Airframe and Engine Examination
A postaccident airframe examination did not reveal any anomalies that would have precluded normal operation. Examination of the left engine found signatures consistent with the engine producing power at impact. Examination of the right engine revealed rotational scoring on the compressor turbine disc and blades, and rotational scoring on the upstream side of the power vane and baffle, indicating that the compressor section was rotating at impact. However, the lack of rotational scoring on the power turbine disc assembly indicated that the engine was not producing power at impact.
Component Testing
Testing of the right engine's fuel control unit, fuel pump, propeller governor, and overspeed governor did not reveal any abnormalities that would have accounted for the loss of power. The reason for the loss of right engine power could not be determined based on the available information.
Probable Cause
The official probable cause is the loss of engine power and the subsequent pilot's loss of control for reasons that could not be determined because post-accident engine examination revealed no anomalies.