Hiller Aircraft Corporation Issues Airworthiness Directive for Helicopter Model UH-12 and UH-12D/UH-12E

Summary

The Hiller Aircraft Corporation has issued an airworthiness directive (AD) for certain helicopter models, requiring inspections of the control rotor blade spar tube and cuff for corrosion or cracks, and repair as necessary, to prevent separation of the control rotor blade assembly and loss of control of the helicopter.