EASA AD 2021-0016
Main Rotor Drive — Main Gearbox / Magnetic Plug and Oil Filter / Planet Gears — Inspection / Modification / Replacement
EASA Airworthiness Directive 2021-0016 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting Airbus Helicopters SA 365 C1, C2, and C3 models. It addresses inspection, modification, and replacement requirements related to the main rotor drive main gearbox magnetic plug, oil filter, and planet gears. The directive aims to improve detection of planet gear spalling to prevent potential gearbox seizure and loss of helicopter control.