Jun 14, 2015
Accident
Substantial Romeoville, IL
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The certified flight instructor (CFI) did not maintain directional control during a downwind emergency running landing to soft muddy terrain, which resulted in a dynamic rollover. Contributing to the accident was the CFI's delayed or insufficient remedial action when the pilot receiving instruction did not control the rotor RPM during hovering flight.
NTSB CEN15CA274