{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain Sikorsky Aircraft Corporation (Sikorsky) Model S-70, S-70A, S- 70C, S-70C(M), and S-70C(M1) helicopters. This AD was prompted by four incidents of disbonding between the tail rotor (T/R) blade pitch horn and the torque tube. This AD requires recurring visual and tap inspections of the T/R blade, and depending on the outcome, replacing the T/R blade. 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/2020/02/07/2020-02446.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"85 FR 7191","comment_url":"https://www.regulations.gov/commenton/FAA-2019-0663-0003","comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective March 13, 2020.","disposition_notes":null,"docket_ids":["Docket No. FAA-2019-0663","Product Identifier 2018-SW-057-AD","Amendment 39-21025","AD 2020-02-17"],"dockets":[{"supporting_documents":[{"title":"2018-SW-057-AD Disposition of Comments (no comments)","document_id":"FAA-2019-0663-0004"},{"title":"Supporting AD Documents","document_id":"FAA-2019-0663-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2020-02-07","updated_at":"2024-11-13T18:11:51.095-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2019-0663-0003","allow_late_comments":true,"id":"FAA-2019-0663-0003","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2019-0663","title":"2018-SW-057-AD, Sikorsky Aircraft Corporation Model S-70, S-70A, S-70C, S-70C(M), and S-70C(M1) Helicopters, to Require Visual and Tap Inspections of the Tail Rotor (T/R) Blades and Replacing T/R Blades as Necessary.\t2018-SW-057-AD\n\n"}],"document_number":"2020-02446","effective_on":"2020-03-13","end_page":7192,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2020/02/07/2020-02446.xml","html_url":"https://www.federalregister.gov/documents/2020/02/07/2020-02446/airworthiness-directives-sikorsky-aircraft-corporation-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2020-02446?publication_date=2020-02-07","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2020-02-07/2020-02446/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":893,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2020-02-07/pdf/2020-02446.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2020-02446.pdf?1580996720","publication_date":"2020-02-07","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2020/02/07/2020-02446.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":"2018-SW-057-AD Disposition of Comments (no comments)","document_id":"FAA-2019-0663-0004"},{"title":"Supporting AD Documents","document_id":"FAA-2019-0663-0002"}],"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-2019-0663","supporting_documents_count":2,"docket_id":"FAA-2019-0663","document_id":"FAA-2019-0663-0003","regulation_id_number":"2120-AA64","title":"2018-SW-057-AD, Sikorsky Aircraft Corporation Model S-70, S-70A, S-70C, S-70C(M), and S-70C(M1) Helicopters, to Require Visual and Tap Inspections of the Tail Rotor (T/R) Blades and Replacing T/R Blades as Necessary.\t2018-SW-057-AD\n\n","checked_regulationsdotgov_at":"2024-11-13T23:00:09Z"},"regulations_dot_gov_url":"https://www.regulations.gov/commenton/FAA-2019-0663-0003","significant":false,"signing_date":null,"start_page":7191,"subtype":null,"title":"Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters","toc_doc":"Sikorsky Aircraft Corporation Helicopters","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":85}