United States Government Publishing Office publisher pbl distributor dst United States National Archives and Records Administration Office of the Federal Register author aut Government Organization text government publication eng FR Regulatory Information 2026_register executive 2026-04-04 article Rules and Regulations D09002ee1e03ea7cf D09002ee1e0444a2c United States Department of Transportation originator org United States Government Agency or Subagency United States Federal Aviation Administration originator org United States Government Agency or Subagency The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters. This AD was prompted by a report of a structural crack in the vertical attachment spar of the tail fin. This AD requires repetitive inspections of certain vertical upper fin spars and, depending on the results, corrective action. This AD also prohibits installing certain upper fin assemblies. The FAA is issuing this AD to address the unsafe condition on these products. 91 FR 17135 https://www.govinfo.gov/app/details/FR-2026-04-06/2026-06621 2026-06621 fr06ap26-3 RIN 2120-AA64 4910-13-P Docket No. FAA-2025-5039 Project Identifier MCAI-2024-00426-R Amendment 39-23303 AD 2026-07-08 https://www.govinfo.gov/app/details/FR-2026-04-06/2026-06621 https://www.govinfo.gov/content/pkg/FR-2026-04-06/html/2026-06621.htm https://www.govinfo.gov/content/pkg/FR-2026-04-06/pdf/2026-06621.pdf Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety 3 p. 17135 17137 91 FR 17135 Title 14 Part 39 14 CFR Part 39 RIN 2120-AA64 Airworthiness Directives; Airbus Helicopters; Federal Register Vol. 91, Issue RULE 2026-06621 DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 2026-05-11 Docket No. FAA-2025-5039 Project Identifier MCAI-2024-00426-R Amendment 39-23303 AD 2026-07-08 4910-13-P 2026-06621 Final rule.

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters. This AD was prompted by a report of a structural crack in the vertical attachment spar of the tail fin. This AD requires repetitive inspections of certain vertical upper fin spars and, depending on the results, corrective action. This AD also prohibits installing certain upper fin assemblies. The FAA is issuing this AD to address the unsafe condition on these products.

This AD is effective May 11, 2026. Yves Petiote, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (202) 975-4867; email: yves.petiote@faa.gov. Air Transportation Aircraft Aviation Safety Incorporation by Reference Safety Airworthiness Directives Airbus Helicopters, ADs@easa.europa.eu AMOC@faa.gov fr.inspection@nara.gov yves.petiote@faa.gov airbus.com/en/products-services/helicopters/hcare-services/airbusworld regulations.gov www.archives.gov/federal-register/cfr/ibr-locations Vol. 91, no. 65 Office of the Federal Register, National Archives and Records Administration 2026-04-06 continuing daily deposited born digital 484 p. Table of Contents: AE 2.7: GS 4.107: AE 2.106: KF70.A2 https://www.govinfo.gov/app/details/FR-2026-04-06 P0b002ee1e0443f4a 0097-6326 0042-1219 0364-1406 769-004-00000-9 000582072 f:fr06ap26 https://www.govinfo.gov/app/details/FR-2026-04-06 https://www.govinfo.gov/content/pkg/FR-2026-04-06/pdf/FR-2026-04-06.pdf https://www.govinfo.gov/content/pkg/FR-2026-04-06/xml/FR-2026-04-06.xml fdlp 17129 17602 DGPO 2026-04-04 2026-04-04 FR-2026-04-06 machine generated eng FR FR-2026-04-06 91 65