{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Textron Canada Limited (BTCL) Model 407 helicopters. This proposed AD was prompted by a determination that chafing can occur at various locations on the electrical harnesses located in the aircraft instrument panel area. This proposed AD would require a one- time detailed visual inspection of the electrical harnesses for chafing and corrective actions if necessary. This proposed AD would also require rotation of the backshell cast housing of connectors of the lower engine airframe unit and installation of a wire harness bracket and support, and for certain helicopters, installation of a wire bundle sleeve. 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/2026/02/03/2026-02138.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"91 FR 4857","comment_url":null,"comments_close_on":"2026-03-20","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this NPRM by March 20, 2026.","disposition_notes":null,"docket_ids":["Docket No. FAA-2026-0736","Project Identifier MCAI-2025-00698-R"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2026-0736-0004"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2026-0736-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2026-02-03","updated_at":"2026-03-21T00:02:21.640-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2026-0736-0001","allow_late_comments":false,"id":"FAA-2026-0736-0001","comment_end_date":"2026-03-21","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2026-0736","title":"MCAI-2025-00698-R; Bell Textron Canada Limited 407 – Electrical harness chafing condition"}],"document_number":"2026-02138","effective_on":null,"end_page":4860,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/02/03/2026-02138.xml","html_url":"https://www.federalregister.gov/documents/2026/02/03/2026-02138/airworthiness-directives-bell-textron-canada-limited-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-02138?publication_date=2026-02-03","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-02-03/2026-02138/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":237,"last_updated":"2026-07-28 02:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-02-03/pdf/2026-02138.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-02138.pdf?1770039919","publication_date":"2026-02-03","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/02/03/2026-02138.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-2026-0736-0002"}],"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-2026-0736","supporting_documents_count":1,"docket_id":"FAA-2026-0736","document_id":"FAA-2026-0736-0001","regulation_id_number":"2120-AA64","title":"MCAI-2025-00698-R; Bell Textron Canada Limited 407 – Electrical harness chafing condition","checked_regulationsdotgov_at":"2026-03-21T04:02:20Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":4857,"subtype":null,"title":"Airworthiness Directives; Bell Textron Canada Limited Helicopters","toc_doc":"Bell Textron Canada Limited Helicopters","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":91}