{"abstract":"We are adopting a new airworthiness directive (AD) for Bell Model 206L-4 and 407 helicopters. This AD requires replacing or reworking certain aft bearing caps. This AD was prompted by the manufacture of certain freewheel aft bearing caps without a lubrication channel to allow oil flow into the aft bearing support assembly. The actions of this AD are intended to prevent failure of the freewheel unit and subsequent loss of control of the helicopter.","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/2013/10/31/2013-25310.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"78 FR 65178","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective December 5, 2013.","disposition_notes":null,"docket_ids":["Docket No. FAA-2013-0526","Directorate Identifier 2008-SW-14-AD","Amendment 39-17633","AD 2013-22-01"],"dockets":[],"document_number":"2013-25310","effective_on":"2013-12-05","end_page":65180,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2013/10/31/2013-25310.xml","html_url":"https://www.federalregister.gov/documents/2013/10/31/2013-25310/airworthiness-directives-bell-helicopter-textron-canada-bell-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2013-25310?publication_date=2013-10-31","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2013-10-31/2013-25310/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":119,"last_updated":"2026-08-26 02:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2013-10-31/pdf/2013-25310.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2013-25310.pdf?1383137336","publication_date":"2013-10-31","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2013/10/31/2013-25310.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":{"checked_regulationsdotgov_at":"2013-11-20T08:06:13Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":65178,"subtype":null,"title":"Airworthiness Directives; Bell Helicopter Textron Canada (Bell) Helicopters","toc_doc":"Bell Helicopter Textron Canada (Bell) Helicopters","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":78}