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EASA issues Airworthiness Directive for SportStar RTC, Viper SD-4, Breezer B600, PS-28 Cruiser in EU; compels inspection of propeller gearboxes. TE - Airworthiness Directive EASA AD No.: 2026-0170 TE.CAP.00110-012 © European Union Aviation Safety Agency. All rights reserved. ISO9001 Certified. Proprietary document. Copies are not controlled. Confirm revision status through the EASA-Internet/Intranet. An agency of the European Union Page 1 of 5 Airworthiness Directive AD No.: 2026-0170 Issued: 01 September 2026 Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation (EU) 2018/1139 on behalf of the European Union, its Member States and of the European third countries that participate in the activities of EASA under Article 129 of that Regulation. This AD is issued in accordance with Regulation (EU) 748/2012, Part 21.A.3B. In accordance with Regulation (EU) 1321/2014 Annex I Part M.A.301, or Annex Vb Part ML.A.301, as applicable, the continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may operate an aircraft to which an AD applies, except in accordance with the requirements of that AD, unless otherwise specified by the Agency [Regulation (EU) 1321/2014 Annex I Part M.A.303, or Annex Vb Part ML.A.303, as applicable] or agreed with the Authority of the State of Registry [Regulation (EU) 2018/1139, Article 71 exemption]. Design Approval Holder’s Names: EVEKTOR, spol. s.r.o. TOMARK, s.r.o. Strojnícka 5 080 01 Prešov Breezer Aircraft GmbH & Co. KG Czech Aircraft Group s.r.o. ...