LAURENS, SC, USA
N7442F
HUGHES 269C
THE PLT WAS FLYING AN UNDERGROUND CABLE PATROL AT 500-600 FT AGL WHEN THE ACCIDENT OCCURRED. THE PLT REPORTED PWR WAS SET AT 20' HG, 3,000 RPM WHEN A 'VERY LOUD POP' WAS HEARD. THE PLT LIKENED THE SOUND TO BEING HIT BY GROUND FIRE. THE ACFT YAWED AND THE ENG OVERSPED. AN AUTOROTATION WAS PERFORMED INTO AN ABANDONED MINING PIT. THE ACFT NOSED UP AND ROLLED OVER ON ITS RIGHT SIDE. THE PLT STATED THAT THE ENG WOULD RESPOND TO THROTTLE BUT THE MAIN ROTOR WOULD NOT FOLLOW PWR CHANGES. THE MAIN ROTOR TRANSMISSION TO HAVE A RING GEAR CARRIER FAILURE. AD 81-1704 AND RELATED SERVICE NOTICE CONCERNING THIS PART HAD NOT BEEN COMPLIED WITH.
Source: NTSB Aviation Accident Database
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