{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for 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. For certain S/Ns of V2500-A1, V2522-A5, V2524-A5, V2527-A5, V2527E-A5, V2527M-A5, V2530-A5, and V2533-A5 series turbofan engines, this proposed AD would require initial and repetitive on-wing ultrasonic inspections (UIs) of the high-pressure compressor (HPC) stage 3 to 8 drum for cracks. As mandatory terminating action to the repetitive inspections, this proposed AD would require removal from service of the fully silver plated nuts attaching the HPC stage 3 to 8 drum to the HPC stage 9 to 12 drum, removal of silver residue from the HPC stage 3 to 8 drum, and fluorescent penetrant inspection (FPI) of the stage 3 to 8 drum within a specified time. For all other engines, this proposed AD would require removal from service of the fully silver plated nuts attaching the HPC stage 3 to 8 drum to the HPC stage 9 to 12 drum, removal of silver residue from the HPC stage 3 to 8 drum, and FPI of the HPC stage 3 to 8 drum at the next drum piece-part exposure. This proposed AD results from reports of 39 HPC stage 3 to 8 drums found cracked since March 2009. We are proposing this AD to prevent uncontained failure of the HPC stage 3 to 8 drum, which could result in 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/2010/02/12/2010-2999.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"75 FR 6860","comment_url":null,"comments_close_on":"2010-04-13","correction_of":null,"corrections":[],"dates":"We must receive any comments on this proposed AD by April 13, 2010.","disposition_notes":null,"docket_ids":["Docket No. FAA-2009-0544","Directorate Identifier 2009-NE-37-AD"],"dockets":[],"document_number":"2010-2999","effective_on":null,"end_page":6862,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2010/02/12/2010-2999.xml","html_url":"https://www.federalregister.gov/documents/2010/02/12/2010-2999/airworthiness-directives-international-aero-engines-ag-iae-v2500-a1-v2522-a5-v2524-a5-v2525-d5","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2010-2999?publication_date=2010-02-12","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2010-02-12/2010-2999/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":954,"last_updated":"2026-08-26 00:15:02 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2010-02-12/pdf/2010-2999.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2010-02-12","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2010/02/12/2010-2999.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&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_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","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":"2010-02-12T16:02:18Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":6860,"subtype":null,"title":"Airworthiness Directives; International Aero Engines AG (IAE) V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 Turbofan Engines","toc_doc":"International Aero Engines AG (IAE) V2500A1, V2522A5, V2524A5, V2525D5, V2527A5, V2527EA5, et al. Turbofan Engines","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":75}