{"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 model turbofan engines. This AD was prompted by the detection of melt-related freckles in the billet, which may reduce the life of certain compressor rotor stages 6-10 spools, high pressure turbine (HPT) rotor interstage seals, HPT rotor stage 2 disks, low pressure turbine (LPT) stage 1 disks, LPT stage 2 disks, LPT stage 3 disks, and LPT stage 4 disks. This AD requires revising the airworthiness limitations section (ALS) of the applicable CFM LEAP-1A Engine Shop Manual (ESM) and the operator's existing approved continuous airworthiness maintenance program (CAMP) to incorporate reduced life limits for these parts. This AD also requires the removal of certain LPT stage 4 disks identified by serial number (S/N) prior to their new life limits. 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/2022/05/23/R1-2022-10447.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"87 FR 31119","comment_url":null,"comments_close_on":null,"correction_of":"https://www.federalregister.gov/api/v1/documents/2022-10447","corrections":[],"dates":"This AD is effective June 21, 2022.","disposition_notes":null,"docket_ids":["Docket No. FAA-2021-1183","Project Identifier AD-2021-01193-E","Amendment 39-22029","AD 2022-09-09"],"dockets":[],"document_number":"R1-2022-10447","effective_on":"2022-06-21","end_page":31123,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2022/05/23/R1-2022-10447.xml","html_url":"https://www.federalregister.gov/documents/2022/05/23/R1-2022-10447/airworthiness-directives-cfm-international-sa-turbofan-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/R1-2022-10447?publication_date=2022-05-23","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2022-05-23/R1-2022-10447/mods.xml","not_received_for_publication":null,"page_length":5,"page_views":{"count":379,"last_updated":"2026-04-04 10:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2022-05-23/pdf/R1-2022-10447.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/R1-2022-10447.pdf?1653050720","publication_date":"2022-05-23","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2022/05/23/R1-2022-10447.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":"Supporting AD Documents","document_id":"FAA-2021-1183-0006"}],"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-2021-1183","supporting_documents_count":1,"docket_id":"FAA-2021-1183","document_id":"FAA-2021-1183-0007","regulation_id_number":"2120-AA64","title":"AD-2021-01193-E CFM International, S.A. LEAP-1A model turbofan engines; R65 Freckle ALS Life Reduction","checked_regulationsdotgov_at":"2022-05-25T03:30:05Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":31119,"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":87}