May 22, 1989
Accident
Substantial WATERFORD, WI
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
THE PILOT'S INABILITY TO MAINTAIN CONTROL DURING AN AUTOROTATIONAL LANDING ATTEMPT FOLLOWING THE FAILURE OF THE MAIN ROTOR DRIVE TRAIN TORSIONAL COUPLING.
NTSB CHI89DEP04