Jul 21, 2015
Accident
Destroyed Walla Walla, WA
Injuries1 minor
Phase of Flight-
ConditionsVMC
OperationFAR 133
Probable Cause
The helicopter’s reduction in aerodynamic lift while operating in variable wind conditions for reasons that could not be determined because postaccident examination did not reveal any evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation.
NTSB WPR15LA219