Jul 20, 2023
Incident
Minor Rochester, MN
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
Mechanically distressed reduction gears causing an engine overspeed and turbine blade tensile overload and subsequent uncontainment. Contributing to the uncontainment was the operator’s use of the engine after knowingly purchasing the engine in an unserviceable condition and only conducting a periodic inspection before flight.
NTSB ENG23LA034