{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain General Electric Company (GE) GEnx-1B64, 1B64/P1, -1B64/P2, - 1B67, -1B67/P1, -1B67/P2, -1B70, -1B70/75/P1, -1B70/75/P2, -1B70/P1, - 1B70/P2, -1B70C/P1, -1B70C/P2, -1B74/75/P1, -1B74/75/P2, -1B76/P2, - 1B76A/P2, -2B67, -2B67/P, and -2B67B model turbofan engines. This AD was prompted by a finding during an inspection by the manufacturer that two stages 6-10 compressor rotor spools in the high-pressure compressor (HPC) assembly were damaged at similar locations. Additionally, the manufacturer reported that certain stages 6-10 compressor rotor spool webs did not undergo a required fluorescent penetrant inspection (FPI) during production. This AD requires inspection of the stages 6-10 compressor rotor spool and, depending on the results of the inspection, replacement of the stages 6-10 compressor rotor spool. 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/2021/06/25/2021-13424.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"86 FR 33494","comment_url":"https://www.regulations.gov/commenton/FAA-2020-0850-0009","comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective July 30, 2021.","disposition_notes":null,"docket_ids":["Docket No. FAA-2020-0850","Project Identifier AD-2020-00288-E","Amendment 39-21569","AD 2021-11-07"],"dockets":[{"supporting_documents":[{"title":"Supporting AD Documents","document_id":"FAA-2020-0850-0010"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2021-06-25","updated_at":"2024-11-06T21:07:00.887-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2020-0850-0009","allow_late_comments":true,"id":"FAA-2020-0850-0009","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2020-0850","title":"AD-2020-00288-E\nGeneral Electric Company GEnx-1B and GEnx-2B model turbofan engines"}],"document_number":"2021-13424","effective_on":"2021-07-30","end_page":33498,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/06/25/2021-13424.xml","html_url":"https://www.federalregister.gov/documents/2021/06/25/2021-13424/airworthiness-directives-general-electric-company-turbofan-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-13424?publication_date=2021-06-25","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-06-25/2021-13424/mods.xml","not_received_for_publication":null,"page_length":5,"page_views":{"count":868,"last_updated":"2026-04-04 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-06-25/pdf/2021-13424.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-13424.pdf?1624538726","publication_date":"2021-06-25","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/06/25/2021-13424.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-2020-0850-0010"}],"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-2020-0850","supporting_documents_count":1,"docket_id":"FAA-2020-0850","document_id":"FAA-2020-0850-0009","regulation_id_number":"2120-AA64","title":"AD-2020-00288-E\nGeneral Electric Company GEnx-1B and GEnx-2B model turbofan engines","checked_regulationsdotgov_at":"2024-11-07T23:00:19Z"},"regulations_dot_gov_url":"https://www.regulations.gov/commenton/FAA-2020-0850-0009","significant":false,"signing_date":null,"start_page":33494,"subtype":null,"title":"Airworthiness Directives; General Electric Company Turbofan Engines","toc_doc":"General Electric Company Turbofan Engines","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":86}