{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, AS350D, EC130B4, and EC130T2 helicopters. This proposed AD was prompted by reports of an incorrectly installed engine flange on the main gear box (MGB) engine coupling. This proposed AD would require inspecting the MGB engine coupling for correct installation and, depending on the results, corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.","action":"Notice of proposed rulemaking (NPRM).","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/2026/05/15/2026-09773.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"91 FR 27873","comment_url":"http://www.regulations.gov/commenton/FAA-2026-4638-0001","comments_close_on":"2026-06-29","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this NPRM by June 29, 2026.","disposition_notes":null,"docket_ids":["Docket No. FAA-2026-4638","Project Identifier MCAI-2023-00794-R"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2026-4638-0002"}],"agency_name":"FAA","documents":[{"comment_count":1,"comment_start_date":"2026-05-15","updated_at":"2026-05-20T01:56:13.450-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2026-4638-0001","allow_late_comments":false,"id":"FAA-2026-4638-0001","comment_end_date":"2026-06-30","regulations_dot_gov_open_for_comment":true}],"supporting_documents_count":1,"id":"FAA-2026-4638","title":"2026-NM-XXXX"}],"document_number":"2026-09773","effective_on":null,"end_page":27876,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/05/15/2026-09773.xml","html_url":"https://www.federalregister.gov/documents/2026/05/15/2026-09773/airworthiness-directives-airbus-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-09773?publication_date=2026-05-15","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-05-15/2026-09773/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":159,"last_updated":"2026-05-25 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-05-15/pdf/2026-09773.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-09773.pdf?1778762721","publication_date":"2026-05-15","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/05/15/2026-09773.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-2026-4638-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2126-AA64/certification-of-safety-auditors-safety-investigators-and-safety-inspectors","title":"Certification of Safety Auditors, Safety Investigators, and Safety Inspectors"},"comments_count":1,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2026-4638","supporting_documents_count":1,"docket_id":"FAA-2026-4638","document_id":"FAA-2026-4638-0001","regulation_id_number":"2126-AA64","title":"2026-NM-XXXX","checked_regulationsdotgov_at":"2026-05-21T04:55:04Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/FAA-2026-4638-0001","significant":false,"signing_date":null,"start_page":27873,"subtype":null,"title":"Airworthiness Directives; Airbus Helicopters","toc_doc":"Airbus Helicopters","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":91}