{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all CFM International, S.A. (CFM) LEAP-1A23, LEAP-1A24, LEAP-1A24E1, LEAP- 1A26, LEAP-1A26CJ, LEAP-1A26E1, LEAP-1A29, LEAP-1A29CJ, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2, and LEAP-1A35A (LEAP-1A) model turbofan engines. This AD was prompted by a manufacturer investigation that revealed that certain high-pressure turbine (HPT) rotor stage 1 disks (HPT stage 1 disks), forward outer seals, and compressor rotor stages 6-10 spools were manufactured from material suspected to have reduced material properties due to iron inclusion. This AD requires replacement of certain HPT stage 1 disks, forward outer seals, and compressor rotor stages 6-10 spools. The FAA is issuing this AD to address the unsafe condition on these products.","action":"Final rule.","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/2023/05/19/2023-10763.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"88 FR 32092","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective June 23, 2023.","disposition_notes":null,"docket_ids":["Docket No. FAA-2023-0653","Project Identifier AD-2023-00280-E","Amendment 39-22429","AD 2023-09-06"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-0653-0004"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2023-05-19","updated_at":"2023-05-19T09:57:25.262-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2023-0653-0003","allow_late_comments":null,"id":"FAA-2023-0653-0003","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2023-0653","title":"AD-2023-00280-E; CFM International, S.A. LEAP-1A engines; material defects - Part replacement"}],"document_number":"2023-10763","effective_on":"2023-06-23","end_page":32094,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2023/05/19/2023-10763.xml","html_url":"https://www.federalregister.gov/documents/2023/05/19/2023-10763/airworthiness-directives-cfm-international-sa-turbofan-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2023-10763?publication_date=2023-05-19","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2023-05-19/2023-10763/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":530,"last_updated":"2026-10-23 10:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2023-05-19/pdf/2023-10763.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2023-10763.pdf?1684413942","publication_date":"2023-05-19","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2023/05/19/2023-10763.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-2023-0653-0004"}],"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-2023-0653","supporting_documents_count":1,"docket_id":"FAA-2023-0653","document_id":"FAA-2023-0653-0003","regulation_id_number":"2120-AA64","title":"AD-2023-00280-E; CFM International, S.A. LEAP-1A engines; material defects - Part replacement","checked_regulationsdotgov_at":"2023-05-20T13:00:08Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":32092,"subtype":null,"title":"Airworthiness Directives; CFM International, S.A. Turbofan Engines","toc_doc":"CFM International, S.A. Turbofan Engines","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":88}