{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all Leonardo S.p.a. Model A109C, A109E, A109S, and AW109SP helicopters. This AD was prompted by a report of a quality escape on a batch of main rotor blades (MRBs). This AD requires repetitively tap inspecting certain MRBs and replacing those MRBs. This AD also prohibits installing those MRBs, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.","action":"Final rule.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation Department","id":492,"url":"https://www.federalregister.gov/agencies/transportation-department","json_url":"https://www.federalregister.gov/api/v1/agencies/492","parent_id":null,"slug":"transportation-department"},{"raw_name":"Federal Aviation Administration","name":"Federal Aviation Administration","id":159,"url":"https://www.federalregister.gov/agencies/federal-aviation-administration","json_url":"https://www.federalregister.gov/api/v1/agencies/159","parent_id":492,"slug":"federal-aviation-administration"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2025/04/18/2025-06711.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"90 FR 16456","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective May 23, 2025.","disposition_notes":null,"docket_ids":["Docket No. FAA-2024-2425","Project Identifier MCAI-2023-00967-R","Amendment 39-23009","AD 2025-07-07"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-2425-0005"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-2425-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2025-04-18","updated_at":"2025-04-18T08:58:35.994-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2024-2425-0004","allow_late_comments":false,"id":"FAA-2024-2425-0004","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2024-2425","title":"MCAI-2023-00967-R; Leonardo A109 helicopters Main rotor blades"}],"document_number":"2025-06711","effective_on":"2025-05-23","end_page":16458,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/04/18/2025-06711.xml","html_url":"https://www.federalregister.gov/documents/2025/04/18/2025-06711/airworthiness-directives-leonardo-spa-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-06711?publication_date=2025-04-18","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-04-18/2025-06711/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":184,"last_updated":"2026-04-04 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-04-18/pdf/2025-06711.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-06711.pdf?1744893920","publication_date":"2025-04-18","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/04/18/2025-06711.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202410","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202410&RIN=2120-AA64&operation=OPERATION_EXPORT_XML","priority_category":"Routine and Frequent"}},"regulation_id_numbers":["2120-AA64"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-2425-0005"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-2425-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":0,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2024-2425","supporting_documents_count":2,"docket_id":"FAA-2024-2425","document_id":"FAA-2024-2425-0004","regulation_id_number":"2120-AA64","title":"MCAI-2023-00967-R; Leonardo A109 helicopters Main rotor blades","checked_regulationsdotgov_at":"2025-04-19T11:55:04Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":16456,"subtype":null,"title":"Airworthiness Directives; Leonardo S.p.a. Helicopters","toc_doc":"Leonardo S.p.a. Helicopters","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":90}