Jun 11, 2012
Accident
Substantial Riverton, WY
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 137
Probable Cause
An engine overspeed shortly after takeoff for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or failures that would have precluded normal operation.
NTSB WPR12LA256