{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, and AS350D helicopters; Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and Model EC130 B4 and EC130 T2 helicopters. This proposed AD was prompted by a report of a missing retaining ring of the inner race of the main rotor mast (MRM) upper bearing. This proposed AD would require a one-time inspection to verify the presence and correct installation of the MRM upper bearing retaining rings, a repetitive inspection of the sealant bead on the MRM for damage, and corrective actions if necessary. The FAA is proposing this AD to address the unsafe condition on these products.","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/2020/09/21/2020-20631.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"85 FR 59217","comment_url":"https://www.regulations.gov/commenton/FAA-2020-0847-0001","comments_close_on":"2020-11-05","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this proposed AD by November 5, 2020.","disposition_notes":null,"docket_ids":["Docket No. FAA-2020-0847","Product Identifier 2018-SW-087-AD"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2020-0847-0010"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2020-0847-0002"}],"agency_name":"FAA","documents":[{"comment_count":6,"comment_start_date":"2020-09-21","updated_at":"2024-11-06T20:32:19.607-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2020-0847-0001","allow_late_comments":true,"id":"FAA-2020-0847-0001","comment_end_date":"2020-11-06","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2020-0847","title":"2018-SW-087-AD \nAirbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, and AS350D helicopters; Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and Model EC130 B4 and EC130 T2 helicopters"}],"document_number":"2020-20631","effective_on":null,"end_page":59220,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2020/09/21/2020-20631.xml","html_url":"https://www.federalregister.gov/documents/2020/09/21/2020-20631/airworthiness-directives-airbus-helicopters","images":{"EP21SE20.001":{"large":"https://img.federalregister.gov/EP21SE20.001/EP21SE20.001_large.png","original_size":"https://img.federalregister.gov/EP21SE20.001/EP21SE20.001_original_size.png"}},"images_metadata":{"EP21SE20.001":{"large":{"identifier":"EP21SE20.001","content_type":"image/png","size":15031,"width":820,"sha":"9a0960fe0da75b49e301415ebe7e9b93","url":"https://img.federalregister.gov/EP21SE20.001/EP21SE20.001_large.png","height":242},"original_size":{"identifier":"EP21SE20.001","content_type":"image/png","size":9787,"width":1823,"sha":"e462bf50e6ef0598f950cd6173d8c9ed","url":"https://img.federalregister.gov/EP21SE20.001/EP21SE20.001_original_size.png","height":538}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2020-20631?publication_date=2020-09-21","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2020-09-21/2020-20631/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":327,"last_updated":"2026-06-17 20:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2020-09-21/pdf/2020-20631.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2020-20631.pdf?1600433116","publication_date":"2020-09-21","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2020/09/21/2020-20631.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":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2020-0847-0010"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2020-0847-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":6,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2020-0847","supporting_documents_count":2,"docket_id":"FAA-2020-0847","document_id":"FAA-2020-0847-0001","regulation_id_number":"2120-AA64","title":"2018-SW-087-AD \nAirbus Helicopters Model AS350B, AS350BA, AS350B1, AS350B2, AS350B3, and AS350D helicopters; Model AS355E, AS355F, AS355F1, AS355F2, AS355N, and AS355NP helicopters; and Model EC130 B4 and EC130 T2 helicopters","checked_regulationsdotgov_at":"2024-11-07T00:56:39Z"},"regulations_dot_gov_url":"https://www.regulations.gov/commenton/FAA-2020-0847-0001","significant":false,"signing_date":null,"start_page":59217,"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":"Proposed Rule","volume":85}