Accident Details
A Robinson R-22 helicopter experienced a loss of control while the pilot was performing an out-of-ground-effect (OGE) hover with a 10-knot tailwind. When the pilot raised the collective to maneuver, the helicopter began to spin to the right. The helicopter completed four rotations, descended, and struck the ground.
Pilot Experience
The pilot had accumulated approximately 100 hours of total helicopter flight experience, of which about 10 hours were in OGE hover conditions. After the accident, the pilot told a police officer that he had exceeded the limitations of the tail rotor.
Background on Loss of Tail Rotor Effectiveness
FAA Advisory Circular (AC) 90-95 states that all single main rotor helicopters are susceptible to loss of tail rotor effectiveness (LTE). The AC advises pilots to avoid tailwinds, OGE hover, and high power demand when maneuvering between hover and 30 knots, and to be aware of wind direction and velocity. In 1995, the FAA sent a letter to all U.S. helicopter manufacturers recommending that they include a discussion on LTE in operator's handbooks and flight manuals. The Robinson Helicopter Company has not complied with that request.