EASA AD 2026-0195
Tail Rotor Drive – Tail Gear Box Control Rod Bearings – Replacement / Life Limitation
Summary
EASA Airworthiness Directive 2026-0195 is an airworthiness directive issued by the European Union Aviation Safety Agency affecting all Airbus Helicopters SA 365 N models. It addresses the replacement and life limitation of tail gear box control rod bearings, specifically part number 360A33-4052-00, due to premature bearing spalling. This directive aims to ensure continued safe operation of the affected helicopters by mandating timely replacement of these components.
What Changed
This new airworthiness directive introduces a reduced life limit for the affected tail gear box control rod bearings. It requires operators to replace these bearings within 500 flight hours after the effective date or before they accumulate 500 flight hours since first installation, whichever is later. Additionally, it allows installation of affected parts only if they are serviceable and mandates their replacement before reaching the 500 flight hour limit.
Why It Matters
This directive is critical for aviation professionals because premature bearing failure can lead to loss of yaw control, posing a significant safety risk. Operators, maintenance organizations, and compliance teams must ensure timely replacement to prevent potential accidents. Adhering to this directive helps maintain airworthiness and regulatory compliance for the affected helicopter fleet.
What To Do
Operators of Airbus Helicopters SA 365 N must replace any affected tail gear box control rod bearing (part number 360A33-4052-00) within 500 flight hours after 27 October 2026 or before the bearing reaches 500 flight hours since first installation, whichever is later. Installation of affected parts is permitted only if they are serviceable, and such parts must be replaced before accumulating 500 flight hours. Compliance must follow the instructions in Airbus Helicopters Alert Service Bulletin AS365-05-00-0005.
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