{"abstract":"We propose to adopt a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 407 helicopters with certain tailboom assemblies installed. This proposed AD would require, at specified intervals, inspecting the tailboom assembly for a crack, loose rivet, or other damage. This proposed AD is prompted by a stress analysis of the tailboom skin that revealed high-stress-concentration areas are susceptible to skin cracking. This condition, if not detected, could result in a crack in the tailboom assembly, failure of the tailboom, and subsequent loss of control of the helicopter.","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/2013/02/01/2013-02253.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"78 FR 7308","comment_url":"https://www.regulations.gov/commenton/FAA-2013-0019-0001","comments_close_on":"2013-04-02","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by April 2, 2013.","disposition_notes":null,"docket_ids":["Docket No. FAA-2013-0019","Directorate Identifier 2010-SW-051-AD"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2013-0019-0006"},{"title":"U.S. DOT/FAA -  Disposition of Comments Form (No Comments)","document_id":"FAA-2013-0019-0004"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2013-0019-0003"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2013-0019-0002"}],"agency_name":null,"documents":[{"comment_count":0,"comment_start_date":"2013-02-01","updated_at":"2024-11-07T22:29:20.671-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2013-0019-0001","allow_late_comments":true,"id":"FAA-2013-0019-0001","comment_end_date":"2013-04-03","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":4,"id":"FAA-2013-0019","title":"2010-SW-051-AD Bell Helicopter Textron Canada Model 407 helicopters to inspect/modify certain tailboom assemblies."}],"document_number":"2013-02253","effective_on":null,"end_page":7311,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2013/02/01/2013-02253.xml","html_url":"https://www.federalregister.gov/documents/2013/02/01/2013-02253/airworthiness-directives-bell-helicopter-textron-canada-helicopters","images":{"EP01FE13.103":{"large":"https://img.federalregister.gov/EP01FE13.103/EP01FE13.103_large.png","medium":"https://img.federalregister.gov/EP01FE13.103/EP01FE13.103_medium.png","original_size":"https://img.federalregister.gov/EP01FE13.103/EP01FE13.103_original_size.png"},"EP01FE13.104":{"large":"https://img.federalregister.gov/EP01FE13.104/EP01FE13.104_large.png","medium":"https://img.federalregister.gov/EP01FE13.104/EP01FE13.104_medium.png","original_size":"https://img.federalregister.gov/EP01FE13.104/EP01FE13.104_original_size.png"}},"images_metadata":{"EP01FE13.103":{"large":{"identifier":"EP01FE13.103","content_type":"image/png","size":48665,"width":823,"sha":"6f80be42d0a5b3e2d58634bf4299d371","url":"https://img.federalregister.gov/EP01FE13.103/EP01FE13.103_large.png","height":887},"medium":{"identifier":"EP01FE13.103","content_type":"image/png","size":19915,"width":451,"sha":"a0fbafffc6444b28ea3f1d9962a36714","url":"https://img.federalregister.gov/EP01FE13.103/EP01FE13.103_medium.png","height":486},"original_size":{"identifier":"EP01FE13.103","content_type":"image/png","size":48662,"width":1705,"sha":"70cc1b96f32e1f9dbf1d2c9b0c3ee6fe","url":"https://img.federalregister.gov/EP01FE13.103/EP01FE13.103_original_size.png","height":1838}},"EP01FE13.104":{"large":{"identifier":"EP01FE13.104","content_type":"image/png","size":46313,"width":823,"sha":"40bcae8a849292de9e09fc6294486d46","url":"https://img.federalregister.gov/EP01FE13.104/EP01FE13.104_large.png","height":628},"medium":{"identifier":"EP01FE13.104","content_type":"image/png","size":19109,"width":475,"sha":"528fd9389830ffc0b8529f2a46c7b4b7","url":"https://img.federalregister.gov/EP01FE13.104/EP01FE13.104_medium.png","height":362},"original_size":{"identifier":"EP01FE13.104","content_type":"image/png","size":53576,"width":1791,"sha":"2fec782ba106da29d6e50f08da87680c","url":"https://img.federalregister.gov/EP01FE13.104/EP01FE13.104_original_size.png","height":1366}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2013-02253?publication_date=2013-02-01","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2013-02-01/2013-02253/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":289,"last_updated":"2026-08-23 22:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2013-02-01/pdf/2013-02253.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2013-02253.pdf?1359640723","publication_date":"2013-02-01","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2013/02/01/2013-02253.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 - See Attachments","document_id":"FAA-2013-0019-0006"},{"title":"U.S. DOT/FAA -  Disposition of Comments Form (No Comments)","document_id":"FAA-2013-0019-0004"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2013-0019-0003"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2013-0019-0002"}],"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-2013-0019","supporting_documents_count":4,"docket_id":"FAA-2013-0019","document_id":"FAA-2013-0019-0001","regulation_id_number":"2120-AA64","title":"2010-SW-051-AD Bell Helicopter Textron Canada Model 407 helicopters to inspect/modify certain tailboom assemblies.","checked_regulationsdotgov_at":"2024-11-08T22:00:14Z"},"regulations_dot_gov_url":"https://www.regulations.gov/commenton/FAA-2013-0019-0001","significant":false,"signing_date":null,"start_page":7308,"subtype":null,"title":"Airworthiness Directives; Bell Helicopter Textron Canada Helicopters","toc_doc":"Bell Helicopter Textron Canada Helicopters","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":78}