{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all Pratt & Whitney Canada Corp. (P&WC) Model PT6A-64, PT6A-66, PT6A-66A, PT6A-66B, PT6A-66D, PT6A-67, PT6A-67A, PT6A-67AF, PT6A-67AG, PT6A-67B, PT6A-67D, PT6A-67F, PT6A-67P, PT6A-67R, PT6A-67RM, PT6A-67T, PT6A-68, PT6A-68D, PT6E-67XP, and PT6E-66XT engines. The FAA previously sent this AD as an emergency AD to all known U.S. owners and operators of these engines. This AD was prompted by reports of second-stage power turbine (PT2) blade failures. This AD requires removal of affected PT2 blades prior to the next flight and prohibits installation of affected PT2 blades, as specified in a Transport Canada Emergency AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.","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/2024/03/13/2024-05238.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"89 FR 18350","comment_url":"https://www.regulations.gov/commenton/FAA-2024-0458-0001","comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective March 28, 2024. Emergency AD 2024-04-51, issued on February 16, 2024, which contained the requirements of this amendment, was effective with actual notice.","disposition_notes":null,"docket_ids":["Docket No. FAA-2024-0458","Project Identifier MCAI-2024-00116-E","Amendment 39-22694","AD 2024-04-51"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-0458-0003"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-0458-0002"}],"agency_name":"FAA","documents":[{"comment_count":1,"comment_start_date":"2024-03-13","updated_at":"2024-11-13T13:17:54.992-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2024-0458-0001","allow_late_comments":true,"id":"FAA-2024-0458-0001","comment_end_date":"2024-04-30","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2024-0458","title":"MCAI-2024-00116-E; Pratt & Whitney Canada Corp. (P&WC) Model PT6A-64, PT6A-66, PT6A-66A, PT6A-66B, PT6A-66D, PT6A-67, PT6A-67A, PT6A-67AF, PT6A-67AG, PT6A-67B, PT6A-67D, PT6A-67F, PT6A-67P, PT6A-67R, PT6A-67RM, PT6A-67T, PT6A-68, PT6A-68D, PT6E-67XP, and PT6E-66XT engines; replacement of power turbine blades."}],"document_number":"2024-05238","effective_on":"2024-03-28","end_page":18353,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2024/03/13/2024-05238.xml","html_url":"https://www.federalregister.gov/documents/2024/03/13/2024-05238/airworthiness-directives-pratt-and-whitney-canada-corp-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2024-05238?publication_date=2024-03-13","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2024-03-13/2024-05238/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":637,"last_updated":"2026-04-04 08:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2024-03-13/pdf/2024-05238.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2024-05238.pdf?1709915171","publication_date":"2024-03-13","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2024/03/13/2024-05238.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 - Supplemental AD Documents","document_id":"FAA-2024-0458-0003"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-0458-0002"}],"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-2024-0458","supporting_documents_count":2,"docket_id":"FAA-2024-0458","document_id":"FAA-2024-0458-0001","regulation_id_number":"2120-AA64","title":"MCAI-2024-00116-E; Pratt & Whitney Canada Corp. (P&WC) Model PT6A-64, PT6A-66, PT6A-66A, PT6A-66B, PT6A-66D, PT6A-67, PT6A-67A, PT6A-67AF, PT6A-67AG, PT6A-67B, PT6A-67D, PT6A-67F, PT6A-67P, PT6A-67R, PT6A-67RM, PT6A-67T, PT6A-68, PT6A-68D, PT6E-67XP, and PT6E-66XT engines; replacement of power turbine blades.","checked_regulationsdotgov_at":"2024-11-13T22:00:10Z"},"regulations_dot_gov_url":"https://www.regulations.gov/commenton/FAA-2024-0458-0001","significant":false,"signing_date":null,"start_page":18350,"subtype":null,"title":"Airworthiness Directives; Pratt & Whitney Canada Corp. Engines","toc_doc":"Pratt and Whitney Canada Corp. Engines","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":89}