HILO, HI, USA
N58395
HUGHES 369D
THE HELICOPTER TAIL BOOM WAS DAMAGED BY THE MAIN ROTOR BLADES DURING A FORCED AUTOROTATIVE LANDING. THE PLT REPORTED THAT SHORTLY AFTER TAKEOFF AT AN ALT OF 4500 FT MSL, THE ENG N2 DROPPED TO 92% AND APRX 15 SECONDS LATER, THE ENG FLAMED OUT. INVESTIGATION REVEALED THE HELICOPTER WAS FUELED WITH AVGAS INSTEAD OF TURBINE FUEL JUST PRIOR TO TAKEOFF. THE ENG OPERATING MANUAL APPROVES OF THIS FUEL SUBSTITUTION IN EMERGENCY SITUATIONS, HOWEVER, IT ADVISED THAT WHEN AVGAS IS USED, THE FUEL BOOST PUMP MUST BE LEFT ON. THE PLT WAS UNABLE TO RECALL WHETHER OR NOT THE PUMP WAS ON.
Source: NTSB Aviation Accident Database
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