EASA AD 2025-0209
Wings — Centre Wing Box and Belly Fairing Fasteners — Modification
Summary
EASA Airworthiness Directive 2025-0209 is an airworthiness directive applicable to Airbus A350-941 aeroplanes with manufacturer serial numbers 0005 through 0047. It addresses issues related to the centre wing box and belly fairing fasteners, specifically those fasteners with Part Number EN6115 code B. The directive mandates modifications to ensure structural integrity and compliance with safety standards.
What Changed
This new airworthiness directive introduces a requirement to replace affected fasteners on the left-hand and right-hand sides of the centre wing box and belly fairings and to apply additional head nut cap protection. The directive is based on findings from manufacturing investigations that identified improper retorque processes leading to insufficient clamping and potential safety risks.
Why It Matters
This directive is critical for aviation professionals because improper fastener torque can compromise structural integrity and create ignition sources in the event of a fuel leak, potentially causing uncontrolled fires. Operators, maintenance organizations, and compliance teams must address these risks to maintain aircraft safety and regulatory compliance.
What To Do
Operators of affected Airbus A350-941 aeroplanes must replace all affected fasteners and apply additional head nut cap protection in accordance with Airbus Service Bulletin A350-57-P093. These actions must be completed before exceeding 78 months after the effective date of 8 October 2025 to comply with the directive.