NTSB Recommends Revised Inspection Intervals for Hiller Helicopter Control Rotor Blade Cuffs

The National Transportation Safety Board has issued a formal recommendation directed at the Federal Aviation Administration regarding the maintenance standards for specific military aircraft. Specifically, the board advises that the agency revise Airworthiness Directive seventy-seven-oh-seven-zero-five. This revision is intended to incorporate a maximum calendar time interval between inspections of the control rotor blade cuff. The directive applies to Hiller UH-twelve series helicopters. The recommendation aims to ensure that these components are checked at regular, defined intervals to maintain airworthiness and safety standards for this particular class of rotary-wing aircraft.