{"abstract":"This amendment adopts a new airworthiness directive (AD) that is applicable to BMW Rolls-Royce (RR) GmbH models BR700-710A1-10 and BR700-710A2-20 turbofan engines with oil filter differential pressure switch part number (P/N) 21SN04-419 or P/N 21SN04-431 installed. This action requires inspections of oil filter differential pressure switches, and replacement if necessary, in accordance with Rolls-Royce Service Bulletin No. SB-BR700-79-900215, Revision 2, dated August 2, 2000. This amendment is prompted by a report of severe engine oil loss, caused by oil leakage from a defective oil filter differential pressure switch. The actions specified in this AD are intended to prevent defective oil filter differential pressure switches from causing severe engine oil loss, resulting in in-flight shutdowns.","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/2001/01/16/01-917.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"66 FR 3448","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective January 31, 2001. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of January 31, 2001.","disposition_notes":null,"docket_ids":["Docket No. 2000-NE-44-AD","Amendment 39-12071","AD 2001-01-01"],"dockets":[],"document_number":"01-917","effective_on":"2001-01-31","end_page":3450,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2001/01/16/01-917.xml","html_url":"https://www.federalregister.gov/documents/2001/01/16/01-917/airworthiness-directives-bmw-rolls-royce-gmbh-models-br700-710a1-10-and-br700-710a2-20-turbofan","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/01-917?publication_date=2001-01-16","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2001-01-16/01-917/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":137,"last_updated":"2026-08-25 08:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2001-01-16/pdf/01-917.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2001-01-16","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2001/01/16/01-917.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":{},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":3448,"subtype":null,"title":"Airworthiness Directives; BMW Rolls-Royce GmbH Models BR700-710A1-10 and BR700-710A2-20 Turbofan Engines.","toc_doc":"BMW Rolls-Royce GmbH","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":66}