May 22, 2009
Accident
Substantial Rock Springs, AZ
Injuries2 fatal
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The separation of the main rotor head during cruise flight as a result of cyclic fatigue of the main rotor head spindle. The fatigue crack was due to an inadequate manufacturing process.
NTSB WPR09LA253