Nov 15, 2007
Accident
Substantial Meadview, AZ
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 135
Probable Cause
The downward flexing of the standing helicopter's main rotor blades and subsequent impact with its tail boom as a result of another helicopter's rotor blade's vortices. .
NTSB SEA08CA027