EASA AD US-2021-22-11
Rotors Flight Control - Pilot-to-Copilot Tail Rotor Torque Tube - Inspection / Removal
Federal Register Volume 86, Number 231 (December 6, 2021) - Airworthiness Directive 2021-22-11 is a final rule issued by the FAA addressing certain MD Helicopters Inc. models 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, 500N, and 600N equipped with pilot-to-copilot tail rotor torque tube part numbers 369H7531-9, -11, or -13. This directive mandates inspections and potential removal of the torque tube due to a reported spiral crack that compromises tail rotor control. The AD aims to ensure continued airworthiness and safety of these helicopter models.
Airworthiness DirectiveMaintenanceSafety MgmtMd Helicopters Inc (Mdhi) 369Md Helicopters Inc (Mdhi) 500NMd Helicopters Inc (Mdhi) 600NMD Helicopters 369DMD Helicopters 369EMD Helicopters 369FMD Helicopters 369FFMD Helicopters 369HMD Helicopters 369HEMD Helicopters 369HMMD Helicopters 369HSMD Helicopters 500NMD Helicopters 600N