Jul 16, 1990
Accident
Substantial OVANDO, MT
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 133
Probable Cause
THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.
NTSB SEA90LA137