{"abstract":"We are adopting a new airworthiness directive (AD) for Agusta S.p.A. Model AB139 and AW139 helicopters. This AD results from mandatory continuing airworthiness information (MCAI) issued by the European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community. The MCAI states: \"Operators had reported a number of occurrences of in-flight losses of cockpit door windows, both left and right side. This condition, if not corrected, could result in damage to critical components.\" The actions specified by this AD are intended to require that cockpit door windows (windows) be replaced with re-designed windows to prevent a window from separating from the helicopter, contacting the tailboom or tail rotor, resulting in loss of control of the helicopter.","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/2009/03/16/E9-4941.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"74 FR 11009","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD becomes effective on March 31, 2009.","disposition_notes":null,"docket_ids":["Docket No. FAA-2009-0170","Directorate Identifier 2008-SW-45-AD","Amendment 39-15843","AD 2009-06-07"],"dockets":[],"document_number":"E9-4941","effective_on":"2009-03-31","end_page":11011,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2009/03/16/E9-4941.xml","html_url":"https://www.federalregister.gov/documents/2009/03/16/E9-4941/airworthiness-directives-agusta-spa-model-ab139-and-aw139-helicopters","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E9-4941?publication_date=2009-03-16","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2009-03-16/E9-4941/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":198,"last_updated":"2026-05-03 10:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2009-03-16/pdf/E9-4941.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2009-03-16","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2009/03/16/E9-4941.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":{"checked_regulationsdotgov_at":"2011-11-15T16:50:43Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":11009,"subtype":null,"title":"Airworthiness Directives; Agusta S.p.A. Model AB139 and AW139 Helicopters","toc_doc":"Agusta S.p.A. Model AB139 and AW139 Helicopters","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":74}