Keps nut

March 31, 2009 - 4:48am

Aerospatiale AS 350-BA, Princeville, Hawaii, March 8, 2007–The NTSB determined the probable cause of the AS 350 crash was the failure of maintenance personnel to properly tighten (torque) the flight control servo lower attachment clevis and reinstall a functioning lock washer, which resulted in a flight control disconnect and complete loss of helicopter control.