EASA AD US-2020-18-20
Main Rotor - Main Rotor Blade Leading Edge Abrasion Strip - Inspection
FAA Airworthiness Directive 2020-18-20 is a final rule addressing certain MD Helicopters Inc. models 369A, 369D, 369E, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N equipped with specific main rotor blade part numbers fitted with 1.25 inch chord length nickel abrasion strips manufactured or installed by Helicopter Technology Company, LLC. The directive mandates inspections due to reports of abrasion strips detaching in flight, posing a safety risk. It requires tap inspections of the main rotor blade leading edge abrasion strips to detect damage or delamination.
Airworthiness DirectiveMaintenanceSafety MgmtMd Helicopters Inc (Mdhi) 369Md Helicopters Inc (Mdhi) 500NMd Helicopters Inc (Mdhi) 600NMD Helicopters 369AMD Helicopters 369DMD Helicopters 369EMD Helicopters 369FFMD Helicopters 369HMD Helicopters 369HEMD Helicopters 369HMMD Helicopters 369HSMD Helicopters 500NMD Helicopters 600N