{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, AS355N and AS355NP helicopters; and certain Model AS350B3 helicopters. This AD was prompted by a report that, during an unscheduled post-flight inspection of the tail cone area, a crack was found in the spar of the upper part of the vertical fin and fractures were found in the two front attachment screws. This AD requires repetitive visual inspections of the right-hand side of the vertical fin spar for discrepancies (cracking), and corrective action if necessary, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.","action":"Final rule; request for comments.","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/2021/03/08/2021-04800.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"86 FR 13165","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD becomes effective March 23, 2021.","disposition_notes":null,"docket_ids":["Docket No. FAA-2021-0094","Project Identifier MCAI-2021-00100-R","Amendment 39-21437","AD 2021-04-15"],"dockets":[],"document_number":"2021-04800","effective_on":"2021-03-23","end_page":13168,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/03/08/2021-04800.xml","html_url":"https://www.federalregister.gov/documents/2021/03/08/2021-04800/airworthiness-directives-airbus-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-04800?publication_date=2021-03-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-03-08/2021-04800/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":160,"last_updated":"2026-08-26 12:15:06 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-03-08/pdf/2021-04800.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-04800.pdf?1614874526","publication_date":"2021-03-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/03/08/2021-04800.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-2021-0094-0003"},{"title":"Supporting AD Document","document_id":"FAA-2021-0094-0002"}],"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-2021-0094","supporting_documents_count":2,"docket_id":"FAA-2021-0094","document_id":"FAA-2021-0094-0001","regulation_id_number":"2120-AA64","title":"2021-NM-XXXX","checked_regulationsdotgov_at":"2021-05-06T03:30:09Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":13165,"subtype":null,"title":"Airworthiness Directives; Airbus Helicopters","toc_doc":"Airbus Helicopters","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":86}