GRAND FORKS, ND, USA
N11079
HUGHES 269C
THE CFI WAS INSTRUCTING THE PVT RATED DUAL STUDENT IN SIMULATED FORCED LANDINGS. DURING THE POWER RECOVERY FOLLOWING A PRACTICE AUTOROTATION, THE ENGINE FAILED TO REGAIN RPM AT FULL THROTTLE. DURING THE FORCED LANDING, THE HELICOPTER NOSED OVER AT TOUCHDOWN AND THE MAIN ROTOR STRUCK THE TERRAIN. A POST ACCIDENT ENGINE RUN PRODUCED FULL RATED POWER UNDER TEST CELL CONDITIONS. THE ENGINE INSPECTION DID NOT REVEAL EVIDENCE TO EXPLAIN THE REPORTED FAILURE OF THE ENGINE TO RESPOND.
Source: NTSB Aviation Accident Database
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