GRAND FORKS, ND, USA
N5203V
HUGHES 269C
ON JUNE 18, 1985, A STUDENT PLT AND HIS INSTRUCTOR WERE ON ALOCAL TNG FLT. PRIOR TO COMPLETING THE MISSION, THE INSTRUCTOR HAD HIS STUDENT EXECUTE A 180 DEGREE AUTOROTATION. DURING THE MANEUVER, THE MAIN ROTOR RPM WAS ALLOWED TO DECAY INTO THE CRITICAL RANGE WHICH RESULTED IN A HARD LANDING AND SUBSEQUENTLY DESTROYED THE HELICOPTER.
Source: NTSB Aviation Accident Database
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