{"abstract":"The FAA is adopting a new airworthiness directive (AD) for Teledyne Continental Motors (TCM) O-470, IO-470, TSIO-470, IO-520, TSIO-520, IO-550, and IOF-550 series reciprocating engines with TCM EQ3 cylinders installed. This AD requires initial and repetitive visual inspections of TCM EQ3 cylinders for cracks. This AD also requires removal of all EQ3 cylinders as terminating action to the repetitive visual inspections. This AD results from reports of 35 EQ3 cylinders found cracked. We are issuing this AD to prevent loss of engine power due to cracks in the cylinder head, possible engine failure, and fire in the engine compartment.","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/2009/09/22/E9-22287.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"74 FR 48141","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD becomes effective October 7, 2009. The Director of the Federal Register approved the incorporation by reference of certain publications listed in the regulations as of October 7, 2009.","disposition_notes":null,"docket_ids":["Docket No. FAA-2009-0367","Directorate Identifier 2009-NE-10-AD","Amendment 39-16023","AD 2009-19-06"],"dockets":[],"document_number":"E9-22287","effective_on":"2009-10-07","end_page":48143,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2009/09/22/E9-22287.xml","html_url":"https://www.federalregister.gov/documents/2009/09/22/E9-22287/airworthiness-directives-teledyne-continental-motors-o-470-io-470-tsio-470-io-520-tsio-520-io-550","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E9-22287?publication_date=2009-09-22","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2009-09-22/E9-22287/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":3087,"last_updated":"2026-08-25 10:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2009-09-22/pdf/E9-22287.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2009-09-22","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2009/09/22/E9-22287.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 - See Attachments","document_id":"FAA-2009-0367-0004"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2009-0367-0003"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2009-0367","supporting_documents_count":2,"docket_id":"FAA-2009-0367","regulation_id_number":null,"title":"Teledyne Continental Motors O-470, IO-470, TSIO-470, IO-520, TSIO-520, IO-550, and IOF-550 Series Reciprocating Engines ","checked_regulationsdotgov_at":"2009-09-24T13:59:33Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":48141,"subtype":null,"title":"Airworthiness Directives; Teledyne Continental Motors O-470, IO-470, TSIO-470, IO-520, TSIO-520, IO-550, and IOF-550 Series Reciprocating Engines","toc_doc":"Teledyne Continental Motors O470, IO470, TSIO470, IO520, TSIO520, IO550, and IOF550 Series Reciprocating Engines","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":74}