{"abstract":"We propose to adopt a new airworthiness directive (AD) for all Rolls-Royce plc (RR) models RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines. This proposed AD was prompted by low-pressure (LP) compressor blade partial airfoil release events. This proposed AD would require a one-time ultrasonic C-scan inspection of LP compressor blades that had accumulated more than 2,500 flight cycles since new. We are proposing this AD to prevent LP compressor blade airfoil separations, engine damage, and damage to the airplane.","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/2013/01/31/2013-02077.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"78 FR 6749","comment_url":"https://www.regulations.gov/commenton/FAA-2012-1327-0001","comments_close_on":"2013-04-01","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by April 1, 2013.","disposition_notes":null,"docket_ids":["Docket No. FAA-2012-1327","Directorate Identifier 2012-NE-47-AD"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supporting AD Documents","document_id":"FAA-2012-1327-0014"},{"title":"U.S. DOT/FAA - Various Supporting AD Documents","document_id":"FAA-2012-1327-0008"},{"title":"U.S. DOT/FAA - Foreign Airworthiness Directive - Mandatory Continuing Airworthiness Information (MCAI)","document_id":"FAA-2012-1327-0007"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-1327-0005"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-1327-0003"}],"agency_name":"FAA","documents":[{"comment_count":1,"comment_start_date":"2013-01-31","updated_at":"2024-11-07T22:36:22.286-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2012-1327-0001","allow_late_comments":true,"id":"FAA-2012-1327-0001","comment_end_date":"2013-04-02","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":5,"id":"FAA-2012-1327","title":"Rolls-Royce plc Turbofan Engines"}],"document_number":"2013-02077","effective_on":null,"end_page":6750,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2013/01/31/2013-02077.xml","html_url":"https://www.federalregister.gov/documents/2013/01/31/2013-02077/airworthiness-directives-rolls-royce-plc-turbofan-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2013-02077?publication_date=2013-01-31","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2013-01-31/2013-02077/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":142,"last_updated":"2026-10-22 16:15:06 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2013-01-31/pdf/2013-02077.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2013-02077.pdf?1359554594","publication_date":"2013-01-31","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2013/01/31/2013-02077.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-2012-1327-0014"},{"title":"U.S. DOT/FAA - Various Supporting AD Documents","document_id":"FAA-2012-1327-0008"},{"title":"U.S. DOT/FAA - Foreign Airworthiness Directive - Mandatory Continuing Airworthiness Information (MCAI)","document_id":"FAA-2012-1327-0007"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-1327-0005"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-1327-0003"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":1,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2012-1327","supporting_documents_count":5,"docket_id":"FAA-2012-1327","document_id":"FAA-2012-1327-0001","regulation_id_number":"2120-AA64","title":"Rolls-Royce plc Turbofan Engines","checked_regulationsdotgov_at":"2024-11-08T22:00:14Z"},"regulations_dot_gov_url":"https://www.regulations.gov/commenton/FAA-2012-1327-0001","significant":false,"signing_date":null,"start_page":6749,"subtype":null,"title":"Airworthiness Directives; Rolls-Royce plc Turbofan Engines","toc_doc":"Rolls-Royce, PLC Turbofan Engines","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":78}