Main Rotor – Mast – Inspection / Replacement
Superseded. Comply with 2020-0264, which replaces this document.
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Airbus Helicopters EC 225 LP must inspect the swashplate assembly within specified flight hour intervals, starting within 50 flight hours after 15 April 2020 or according to accumulated flight hours since installation or last maintenance check. If defects are found, affected parts must be replaced before further flight. All installed affected parts must be inspected regularly every 150 flight hours thereafter.
Summary
EASA Airworthiness Directive 2020-0079 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting all Airbus Helicopters EC 225 LP helicopters. It addresses a manufacturing defect in the ceramic balls of the swashplate bearing in the main rotor mast assembly, which could lead to premature spalling and potential loss of bearing function. The directive mandates repetitive inspections and, if necessary, replacement of affected main rotor mast assemblies to ensure continued safe operation.
What changed
EASA Airworthiness Directive 2020-0079 introduces mandatory repetitive inspections of the main rotor mast swashplate assembly ball bearing for affected parts with specific part numbers. It also requires replacement of any defective parts found during inspections. This directive is an interim safety measure pending further regulatory action.
Why it matters
This directive is critical for aviation professionals as it addresses a potential failure that could reduce helicopter control and safety. Operators and maintenance organizations must comply to prevent bearing failure and possible main rotor mast overload. Compliance ensures continued airworthiness and regulatory conformity, avoiding operational disruptions or safety incidents.
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