{"abstract":"The FAA is withdrawing an NPRM that published on September 15, 2025, that would have applied to all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model RB211 Trent 768-60, 772-60, and 772B-60 engines. The NPRM would have required removal from service of affected low-pressure compressor (LPC) blades and replacement with a serviceable part. Since the NPRM was issued, it was determined that additional LPC blades are affected by the unsafe condition and were not included in the service material, and the FAA is evaluating for further rulemaking action. Accordingly, during this evaluation, the NPRM is withdrawn.","action":"Notice of proposed rulemaking (NPRM); withdrawal.","agencies":[{"raw_name":"DEPARTMENT OF TRANSPORTATION","name":"Transportation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/2026/05/29/2026-10781.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"91 FR 31992","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"As of May 29, 2026, the proposed rule, which was published in the Federal Register on September 15, 2025 (90 FR 44335), is withdrawn.","disposition_notes":null,"docket_ids":["Docket No. FAA-2025-2541","Product Identifier MCAI-2024-00390-E"],"dockets":[],"document_number":"2026-10781","effective_on":null,"end_page":31992,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2026/05/29/2026-10781.xml","html_url":"https://www.federalregister.gov/documents/2026/05/29/2026-10781/airworthiness-directives-rolls-royce-deutschland-ltd-and-co-kg-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2026-10781?publication_date=2026-05-29","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2026-05-29/2026-10781/mods.xml","not_received_for_publication":null,"page_length":1,"page_views":{"count":82,"last_updated":"2026-06-24 14:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2026-05-29/pdf/2026-10781.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2026-10781.pdf?1779972326","publication_date":"2026-05-29","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2026/05/29/2026-10781.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-2025-2541-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":0,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2025-2541","supporting_documents_count":1,"docket_id":"FAA-2025-2541","document_id":"FAA-2025-2541-0006","regulation_id_number":"2120-AA64","title":"MCAI-2024-00390-E; RRD RB211 Trent Engines; Low Pressure Compressor Blades – Removal from Service","checked_regulationsdotgov_at":"2026-06-09T16:07:25Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":31992,"subtype":null,"title":"Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Engines","toc_doc":"Rolls-Royce Deutschland Ltd and Co KG Engines","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":91}