FAA Proposes New Airworthiness Directive for Hiller Aircraft Helicopters

Summary

The Federal Aviation Administration (FAA) has proposed a new airworthiness directive (AD) to address corrosion issues in Hiller Aircraft Corporation Model UH-12 and UH-12D/UH-12E helicopters, which could lead to separation of the control rotor blade assembly and loss of control. The proposed AD would require inspections of the blade spar tube and cuff for corrosion or cracks, and repair as necessary, to prevent such incidents.