{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH Model MBB-BK 117 D-3 helicopters. This AD was prompted by a determination that certain bolts installed on the horizontal control rods of the flight controls were not dye penetrant inspected for cracks during manufacturing and thus could lead to bolt failure. This AD requires replacement of affected bolts with bolts that are eligible for installation. This AD also prohibits installing an affected bolt on any helicopter. 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/2026/03/26/2026-05885.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"91 FR 14641","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective April 30, 2026.","disposition_notes":null,"docket_ids":["Docket No. FAA-2025-5040","Project Identifier MCAI-2022-01516-R","Amendment 39-23292","AD 2026-06-04"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-5040-0004"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-5040-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2026-03-26","updated_at":"2026-03-26T10:01:21.972-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2025-5040-0003","allow_late_comments":false,"id":"FAA-2025-5040-0003","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2025-5040","title":"MCAI-2022-01516-R; AIRBUS HELICOPTERS DEUTSCHLAND GmbH MBB-BK117 D-3 – Rotors Flight Control"}],"document_number":"2026-05885","effective_on":"2026-04-30","end_page":14643,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/03/26/2026-05885.xml","html_url":"https://www.federalregister.gov/documents/2026/03/26/2026-05885/airworthiness-directives-airbus-helicopters-deutschland-gmbh","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-05885?publication_date=2026-03-26","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-03-26/2026-05885/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":180,"last_updated":"2026-04-05 00:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-03-26/pdf/2026-05885.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-05885.pdf?1774442723","publication_date":"2026-03-26","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/03/26/2026-05885.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&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-2025-5040-0004"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-5040-0002"}],"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-2025-5040","supporting_documents_count":2,"docket_id":"FAA-2025-5040","document_id":"FAA-2025-5040-0003","regulation_id_number":"2120-AA64","title":"MCAI-2022-01516-R; AIRBUS HELICOPTERS DEUTSCHLAND GmbH MBB-BK117 D-3 – Rotors Flight Control","checked_regulationsdotgov_at":"2026-03-27T16:55:09Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":14641,"subtype":null,"title":"Airworthiness Directives; Airbus Helicopters Deutschland GmbH","toc_doc":"Airbus Helicopters Deutschland GmbH","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":91}