{"abstract":"We propose to supersede airworthiness directive (AD) 2012-09- 09 that applies to all International Aero Engines AG (IAE) V2500-A1, V2525-D5, and V2528-D5 turbofan engines, and certain serial numbers (S/ Ns) of IAE V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530- A5, and V2533-A5 turbofan engines. AD 2012-09-09 currently requires cleaning, eddy current inspection (ECI) or fluorescent penetrant inspection (FPI), and initial and repetitive ultrasonic inspections (USIs) of certain high-pressure compressor (HPC) stage 3 to 8 drums, as well as replacement of the drum attachment nuts. Since we issued AD 2012-09-09, we discovered that additional attachment nuts for certain HPC stage 3 to 8 drums are affected. This proposed AD would expand the affected population for initial and repetitive USIs of the HPC stage 3 to 8 drum, revise the inspection intervals, require removal of the affected attachment nuts and any HPC stage 3 to 8 drum found cracked, and require a mandatory terminating action. We are proposing this AD to prevent failure of the HPC stage 3 to 8 drum, which could result in uncontained drum failure, damage to the engine, and damage to the airplane.","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/2014/12/24/2014-30194.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"79 FR 77411","comment_url":null,"comments_close_on":"2015-02-23","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by February 23, 2015.","disposition_notes":null,"docket_ids":["Docket No. FAA-2009-1100","Directorate Identifier 2009-NE-37-AD"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Various Supplemental AD Documents","document_id":"FAA-2009-1100-0047"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0032"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0024"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0016"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0015"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0014"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0013"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0012"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2009-1100-0011"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0009"}],"agency_name":null,"documents":[{"comment_count":12,"comment_start_date":"2014-12-24","updated_at":"2023-03-01T13:16:52.981-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2009-1100-0033","allow_late_comments":null,"id":"FAA-2009-1100-0033","comment_end_date":"2015-02-24","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":11,"id":"FAA-2009-1100","title":"International Aero Engines AG V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 Turbofan Engines "}],"document_number":"2014-30194","effective_on":null,"end_page":77413,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2014/12/24/2014-30194.xml","html_url":"https://www.federalregister.gov/documents/2014/12/24/2014-30194/airworthiness-directives-international-aero-engines-ag-turbofan-engines","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2014-30194?publication_date=2014-12-24","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2014-12-24/2014-30194/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":758,"last_updated":"2026-09-23 06:15:06 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2014-12-24/pdf/2014-30194.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2014-30194.pdf?1419342541","publication_date":"2014-12-24","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2014/12/24/2014-30194.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 - Various Supplemental AD Documents","document_id":"FAA-2009-1100-0047"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0032"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0024"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0016"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0015"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0014"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0013"},{"title":"U.S. DOT/FAA -  See Attachments","document_id":"FAA-2009-1100-0012"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2009-1100-0011"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-1100-0009"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":12,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2009-1100","supporting_documents_count":11,"docket_id":"FAA-2009-1100","document_id":"FAA-2009-1100-0033","regulation_id_number":"2120-AA64","title":"International Aero Engines AG V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 Turbofan Engines ","checked_regulationsdotgov_at":"2023-03-01T18:16:52Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":77411,"subtype":null,"title":"Airworthiness Directives; International Aero Engines AG Turbofan Engines","toc_doc":"International Aero Engines AG Turbofan Engines","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":79}