EASA AD 2019-0108
Main Rotor Drive — Main Gearbox Particle Detector — Replacement
Summary
EASA Airworthiness Directive 2019-0108 is an airworthiness directive issued by the European Union Aviation Safety Agency concerning Airbus Helicopters SA 330 J models. It mandates the replacement of main gearbox particle detectors with an improved version to enhance safety monitoring. This directive applies to all serial numbers of the SA 330 J helicopter.
What Changed
This new airworthiness directive introduces a requirement to replace all affected main gearbox particle detectors, except those with part number 330A32996300, with a serviceable elongated version. It also establishes installation restrictions to ensure only serviceable parts are installed on the helicopters. The directive does not supersede any previous directives.
Why It Matters
This directive is critical for aviation professionals because it addresses a potential safety risk linked to main gearbox failures that could lead to loss of helicopter control. Operators and maintenance organizations must ensure compliance to prevent accidents related to undetected gearbox debris. Compliance ensures continued airworthiness and adherence to European aviation safety regulations.
What To Do
Operators of SA 330 J helicopters must replace affected main gearbox particle detectors with the serviceable part number 330A32996300 within 110 flight hours or 6 months from 31 May 2019, whichever occurs first. Installation of affected parts is only permitted if they are serviceable as defined by the directive. Maintenance teams should follow the instructions in Airbus Helicopters Alert Service Bulletin SA330-65.133 for the replacement procedure.
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