Jun 25, 2007
Accident
Substantial Tucson, AZ
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The certified flight instructor's inadequate supervision of the practice autorotation. Contributing factors included the terrain drop off and the failure of the pilot undergoing instruction to maintain adequate rotor rpm.
NTSB SEA07CA180