{"abstract":"This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 and 767-200 and -300 series airplanes, that requires repetitive inspections to detect damage and wear of the auxiliary track assembly of the thrust reverser, and corrective actions, if necessary. This amendment also requires eventual repair of the auxiliary track assembly, or replacement of the slider and liner or the entire assembly, with new, improved parts, which, when accomplished, would terminate the repetitive inspections. This amendment is prompted by reports of damage and wear to the auxiliary track assembly. The actions specified by this AD are intended to prevent a slider disengaging from the auxiliary track assembly, which could lead to separation of a portion of the thrust reverser from the airplane during flight, possible impact of separated portions on airplane structure, and consequent possible rapid decompression of the airplane, reduced controllability of the airplane, or reduced structural integrity of the fuselage.","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/2000/06/13/00-14436.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"65 FR 37022","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective July 18, 2000.","disposition_notes":null,"docket_ids":["Docket No. 99-NM-208-AD","Amendment 39-11777","AD 2000-11-28"],"dockets":[],"document_number":"00-14436","effective_on":"2000-07-18","end_page":37025,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2000/06/13/00-14436.xml","html_url":"https://www.federalregister.gov/documents/2000/06/13/00-14436/airworthiness-directives-boeing-model-747-400-and-767-200-and--300-series-airplanes-powered-by-pratt","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/00-14436?publication_date=2000-06-13","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2000-06-13/00-14436/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":61,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2000-06-13/pdf/00-14436.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2000-06-13","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2000/06/13/00-14436.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":{"checked_regulationsdotgov_at":"2011-11-12T02:44:09Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":37022,"subtype":null,"title":"Airworthiness Directives; Boeing Model 747-400 and 767-200 and -300 Series Airplanes Powered by Pratt & Whitney Model PW4000 Series Engines","toc_doc":"Boeing","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":65}