DYER, NV, USA
N59414
BELL 47G3B2A
WHILE THE PILOT WAS ATTEMPTING TO HOVER OUT OF GROUND EFFECT OVER STEEP SLOPING MOUNTAINOUS TERRAIN IN HIGH DENSITY ALT WEATHER CONDITIONS, THE ROTOR RPM BEGAN TO DECREASE. HE ATTEMPTED TO MAKE A TAKEOFF, RESULTING IN FURTHER DECAY OF ROTOR RPM, AND IMPACT WITH TERRAIN. THE HELICOPTER ROLLED OVER AND WAS DESTROYED BY POST IMPACT FIRE. THE PILOTS RECOMMENDATION FOR PREVENTION OF THE ACCIDENT: 'AVOID OPERATIONS AT HOVER WHERE LANDING IS NOT POSSIBLE.'
THE PILOTS POOR PLANNING IN ATTEMPTING A HOVER IN UNDESIRABLE CONDITIONS WHICH RESULTING IN THE INABILITY TO MAINTAIN ROTOR ROM. CONTRIBUTING TO THE ACCIDENT WAS THE MOUNTAINOUS TERRAIN AND HIGH DENSITY ALT.
Source: NTSB Aviation Accident Database
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