{"abstract":"We are superseding Emergency Airworthiness Directive (Emergency AD) 2015-24-51 for Airbus Helicopters Model EC120B. Emergency AD 2015-24-51 required inspections of the air conditioning system. This supersedure revises the applicability, some of the terminology, and the inspection requirements. This AD was prompted by a report of an abnormal noise during flight of a Model EC120B helicopter that resulted in a precautionary landing. We are issuing this AD to prevent an 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/2017/04/21/2017-07777.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"82 FR 18690","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD becomes effective May 8, 2017.","disposition_notes":null,"docket_ids":["Docket No. FAA-2016-4674","Directorate Identifier 2016-SW-001-AD","Amendment 39-18835","AD 2017-06-11"],"dockets":[],"document_number":"2017-07777","effective_on":"2017-05-08","end_page":18694,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2017/04/21/2017-07777.xml","html_url":"https://www.federalregister.gov/documents/2017/04/21/2017-07777/airworthiness-directives-airbus-helicopters","images":{"ER21AP17.000":{"large":"https://img.federalregister.gov/ER21AP17.000/ER21AP17.000_large.png","original_size":"https://img.federalregister.gov/ER21AP17.000/ER21AP17.000_original_size.png"}},"images_metadata":{"ER21AP17.000":{"large":{"identifier":"ER21AP17.000","content_type":"image/png","size":23058,"width":823,"sha":"97ea28e8dc1d02193110aaffcde00a49","url":"https://img.federalregister.gov/ER21AP17.000/ER21AP17.000_large.png","height":403},"original_size":{"identifier":"ER21AP17.000","content_type":"image/png","size":38060,"width":3445,"sha":"973e37e79d02738aab10989a9b42c916","url":"https://img.federalregister.gov/ER21AP17.000/ER21AP17.000_original_size.png","height":1687}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2017-07777?publication_date=2017-04-21","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2017-04-21/2017-07777/mods.xml","not_received_for_publication":null,"page_length":5,"page_views":{"count":146,"last_updated":"2026-04-05 00:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2017-04-21/pdf/2017-07777.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2017-07777.pdf?1492692321","publication_date":"2017-04-21","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2017/04/21/2017-07777.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 - Supporting AD Documents","document_id":"FAA-2016-4674-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2016-4674","supporting_documents_count":1,"docket_id":"FAA-2016-4674","regulation_id_number":"2120-AA64","title":"2016-SW-001-AD\nAirbus Helicopters Model EC120B helicopters, to require inspecting a certain air conditioner compressor drive pulley and tail rotor output wheel.\n\n","checked_regulationsdotgov_at":"2017-06-21T05:00:31Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":18690,"subtype":null,"title":"Airworthiness Directives; Airbus Helicopters","toc_doc":"Airbus Helicopters","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":82}