{"abstract":"The FAA proposes to supersede Airworthiness Directive (AD) 2023-01-07, which applies to all GE Aviation Czech s.r.o. (GEAC) (type certificate previously held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Model H75-100, H75-200, H80, H80-100, H80-200, H85-100, and H85-200 engines. AD 2023-01-07 requires revising the airworthiness limitations section (ALS) of the existing engine maintenance manual (EMM) and the operator's existing approved maintenance or inspection program, as applicable, to incorporate updated coefficients and recalculate the cycles accumulated on critical parts. Since the FAA issued AD 2023-01-07, the manufacturer revised the ALS of the EMM to introduce new and more restrictive airworthiness limitations and associated thresholds and intervals for life-limited parts, which prompted this proposed AD. This proposed AD would require revising the ALS of the existing EMM and the operator's existing approved engine maintenance or inspection program, as applicable, to incorporate new and more restrictive instructions and associated thresholds and intervals for life-limited parts, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.","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/2023/09/06/2023-18930.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"88 FR 60896","comment_url":null,"comments_close_on":"2023-10-23","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this NPRM by October 23, 2023.","disposition_notes":null,"docket_ids":["Docket No. FAA-2023-1811","Project Identifier MCAI-2023-00146-E"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-1811-0004"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-1811-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2023-09-06","updated_at":"2023-10-24T00:01:35.243-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2023-1811-0001","allow_late_comments":null,"id":"FAA-2023-1811-0001","comment_end_date":"2023-10-24","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2023-1811","title":"MCAI-2023-00146-E; GE Aviation Czech s.r.o. Model H75-100, H75-200, H80, H80-100, H80-200, H85-100, and H85-200 engines; Time Limits / Maintenance Checks – Airworthiness Limitations Section – Amendment"}],"document_number":"2023-18930","effective_on":null,"end_page":60899,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2023/09/06/2023-18930.xml","html_url":"https://www.federalregister.gov/documents/2023/09/06/2023-18930/airworthiness-directives-ge-aviation-czech-sro-type-certificate-previously-held-by-walter-engines-as","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2023-18930?publication_date=2023-09-06","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2023-09-06/2023-18930/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":93,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2023-09-06/pdf/2023-18930.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2023-18930.pdf?1693917915","publication_date":"2023-09-06","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2023/09/06/2023-18930.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-2023-1811-0004"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-1811-0002"}],"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-2023-1811","supporting_documents_count":2,"docket_id":"FAA-2023-1811","document_id":"FAA-2023-1811-0001","regulation_id_number":"2120-AA64","title":"MCAI-2023-00146-E; GE Aviation Czech s.r.o. Model H75-100, H75-200, H80, H80-100, H80-200, H85-100, and H85-200 engines; Time Limits / Maintenance Checks – Airworthiness Limitations Section – Amendment","checked_regulationsdotgov_at":"2023-10-24T04:01:34Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":60896,"subtype":null,"title":"Airworthiness Directives; GE Aviation Czech s.r.o. (Type Certificate Previously Held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Engines","toc_doc":"GE Aviation Czech s.r.o. (Type Certificate Previously held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s.) Engines","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":88}