CORONA, CA, USA
N756H
ENSTROM F28F
THE STUDENT WAS ASSIGNED TO PRACTICE STEEP APPROACH LANDINGS, HOVERING AND QUICK STOPS. AFTER FLYING FOR ABOUT 45 MINUTES, AND WHILE PRACTICING QUICK STOPS, THE HELICOPTER'S ENGINE BEGAN SPUTTERING, COUGHING AND THEN QUIT. THE PILOT MADE AN AUTOROTATIVE DESCENT AND ROLLED OVER FOLLOWING TOUCHDOWN ON SOFT TERRAIN. DURING THE POST-CRASH EXAM OF THE AIRCRAFT THE ENGINE RPM DROP OFF ASSOCIATED WITH OPERATION OF THE LEFT AND RIGHT MAGNETOS WAS NOTED AT 150 AND 400 RPM, RESPECTIVELY.
THE PARTIAL FAILURE OF THE ENGINE'S RIGHT MAGNETO, WHICH RESULTED IN A LOSS OF ENGINE POWER.
Source: NTSB Aviation Accident Database
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