Main Rotor – Mast – Inspection
Superseded. Comply with 2024-0160, which replaces this document.
- Published
- Effective
- Deadline
- Replaces
- 2020-0079
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of EC 225 LP helicopters must inspect the swashplate assembly of affected main rotor mast parts within specified flight hour limits or timeframes, and continue inspections every 150 flight hours. If discrepancies are found, the affected parts must be replaced before further flight. Compliance deadlines vary based on flight hours accumulated but must be met as outlined in the directive, with the effective date being 16 December 2020.
Summary
EASA Airworthiness Directive 2020-0264 is an airworthiness directive issued for Airbus Helicopters EC 225 LP models. It addresses a manufacturing defect in the ceramic balls of the swashplate bearing in the main rotor mast assembly, which could lead to premature bearing failure and reduced helicopter control. The directive mandates inspections and possible replacement of affected main rotor mast assemblies with specified part numbers.
What changed
EASA Airworthiness Directive 2020-0264 supersedes AD 2020-0079 and expands the scope of affected parts by including additional main rotor mast assemblies, specifically those with part number 332A31-3001-03M. It retains the previous inspection and replacement requirements but applies them to a broader range of parts due to newly identified manufacturing deficiencies.
Why it matters
This directive is critical for aviation professionals because it ensures the continued airworthiness and safe operation of EC 225 LP helicopters by preventing potential loss of main rotor control caused by defective swashplate bearings. Operators and maintenance organizations must comply to avoid in-flight failures that could compromise safety. Compliance also ensures adherence to European Union aviation safety regulations.
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