Aviation Accident Summaries

Aviation Accident Summary FTW88LA152

SALLISAW, OK, USA

Aircraft #1

N2264U

Brantly Helicopter B-2B

Analysis

ACFT EXPERIENCED A HARD LANDING AND ROLLED OVER FOLLOWING A LOSS OF CONTROL IN A HOVER. PLT DELAYED CUTTING THE THROTTLE IN ORDER TO CLEAR A DITCH. INVESTIGATION REVEALED THAT THE TAIL ROTOR DRIVESHAFT COUPLING RETAINING SCREW HAD SEPARATED. THE SEPARATION ALLOWED A DISCONNECT IN THE TAIL ROTOR DRIVESHAFT AND LOSS OF TAIL ROTOR DRIVE. THE REASON FOR THE SCREW FAILURE WAS NOT DETERMINED. ACFT HAD JUST BEEN RETURNED TO SERVICE FOLLOWING EXTENSIVE REPAIRS FOR DAMAGE SUSTAINED IN A PREVIOUS HARD LANDING.

 

Source: NTSB Aviation Accident Database

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