{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. (Leonardo) Model AB139 and AW139 helicopters. This AD requires removing certain engine mounting rods from service and prohibits their installation on any helicopter. This AD was prompted by a report of non-conforming engine mounting rods. The actions of this AD are intended to address an 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/2021/02/25/2021-03660.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"86 FR 11410","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective April 1, 2021.","disposition_notes":null,"docket_ids":["Docket No. FAA-2020-0649","Product Identifier 2019-SW-061-AD","Amendment 39-21410","AD 2021-03-07"],"dockets":[],"document_number":"2021-03660","effective_on":"2021-04-01","end_page":11413,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/02/25/2021-03660.xml","html_url":"https://www.federalregister.gov/documents/2021/02/25/2021-03660/airworthiness-directives-leonardo-spa-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-03660?publication_date=2021-02-25","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-02-25/2021-03660/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":161,"last_updated":"2026-08-23 20:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-02-25/pdf/2021-03660.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-03660.pdf?1614174319","publication_date":"2021-02-25","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/02/25/2021-03660.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":"Supporting AD Document","document_id":"FAA-2020-0649-0004"},{"title":"Supporting AD Documents","document_id":"FAA-2020-0649-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"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-2020-0649","supporting_documents_count":2,"docket_id":"FAA-2020-0649","document_id":"FAA-2020-0649-0003","regulation_id_number":"2120-AA64","title":"2019-SW-061-AD; Leonardo S.p.a. Model AB139 and AW139 Helicopters, to Require Removing Certain Engine Mounting Rods From Service and Prohibit Their Installation on Any Helicopter.","checked_regulationsdotgov_at":"2021-11-04T03:30:09Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":11410,"subtype":null,"title":"Airworthiness Directives; Leonardo S.p.a. Helicopters","toc_doc":"Leonardo S.p.a. Helicopters","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":86}