{"abstract":"We are superseding an existing airworthiness directive (AD) for the products listed above. That AD currently requires initial and repetitive inspections of the low-pressure (LP) turbine discs stage 2 and stage 3 for corrosion, on certain serial number engines. This AD requires the same actions, but extends the applicability to additional engine serial numbers. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:","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/2009/10/27/E9-25031.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"74 FR 55121","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD becomes effective November 12, 2009.","disposition_notes":null,"docket_ids":["Docket No. FAA-2007-0037","Directorate Identifier 2007-NE-41-AD","Amendment 39-16052","AD 2009-22-01"],"dockets":[],"document_number":"E9-25031","effective_on":"2009-11-12","end_page":55123,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2009/10/27/E9-25031.xml","html_url":"https://www.federalregister.gov/documents/2009/10/27/E9-25031/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-rrd-tay-650-15-turbofan-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E9-25031?publication_date=2009-10-27","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2009-10-27/E9-25031/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":43,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2009-10-27/pdf/E9-25031.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2009-10-27","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2009/10/27/E9-25031.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":{"checked_regulationsdotgov_at":"2009-10-27T13:02:43Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":55121,"subtype":null,"title":"Airworthiness Directives; Rolls-Royce Deutschland Ltd. & Co. KG. (RRD) Tay 650-15 Turbofan Engines","toc_doc":"RollsRoyce Deutschland Ltd.  Co. KG. (RRD) Tay 65015 Turbofan Engines","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":74}