{"abstract":"This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 and 747-400D series airplanes, that requires a detailed inspection of the fire extinguishing system tube and clamp for correct installation or a repetitive pressure test of the fire extinguishing system tube for leakage, and corrective action, if necessary. This action is necessary to prevent a chafed hole in the fire extinguishing system tube of the aft cargo compartment, which could result in a lack of fire extinguishing agent and consequent uncontained fire in the aft cargo compartment. This action is intended to address the identified unsafe condition.","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/2004/05/11/04-10251.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"69 FR 26012","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective June 15, 2004.","disposition_notes":null,"docket_ids":["Docket No. 2003-NM-93-AD","Amendment 39-13624","AD 2004-09-33"],"dockets":[],"document_number":"04-10251","effective_on":"2004-06-15","end_page":26013,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2004/05/11/04-10251.xml","html_url":"https://www.federalregister.gov/documents/2004/05/11/04-10251/airworthiness-directives-boeing-model-747-400-and-747-400d-series-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/04-10251?publication_date=2004-05-11","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2004-05-11/04-10251/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":8,"last_updated":"2026-04-03 22:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2004-05-11/pdf/04-10251.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2004-05-11","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2004/05/11/04-10251.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":"2011-11-12T11:36:07Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":26012,"subtype":null,"title":"Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes","toc_doc":"Boeing","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":69}