{"abstract":"This document proposes the supersedure of an existing airworthiness directive (AD); applicable to certain Airbus Model A330, A340-200, and A340-300 series airplanes; that currently requires repetitive inspections to detect discrepancies of the transfer tubes and the collar of the ball nut of the trimmable horizontal stabilizer actuator (THSA); and corrective action, if necessary. This action would expand the applicability of the existing AD; and would require new repetitive inspections for discrepancies of the ball screw assembly; corrective action if necessary; repetitive greasing of the THSA ball nut, and replacement of the THSA if necessary; and a modification or replacement (as applicable) of the ball nut assembly. Such modification or replacement (as applicable) terminates certain repetitive inspections. The actions specified by the proposed AD are intended to prevent degraded operation of the THSA due to the entrance of water into the ball nut. Degraded operation could lead to reduced controllability of the airplane. This action is intended to address the identified unsafe condition.","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/2004/04/05/04-7290.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"69 FR 17610","comment_url":null,"comments_close_on":"2004-05-05","correction_of":null,"corrections":[],"dates":"Comments must be received by May 5, 2004.","disposition_notes":null,"docket_ids":["Docket No. 2001-NM-243-AD"],"dockets":[],"document_number":"04-7290","effective_on":null,"end_page":17615,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2004/04/05/04-7290.xml","html_url":"https://www.federalregister.gov/documents/2004/04/05/04-7290/airworthiness-directives-airbus-model-a330-a340-200-and-a340-300-series-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/04-7290?publication_date=2004-04-05","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2004-04-05/04-7290/mods.xml","not_received_for_publication":null,"page_length":6,"page_views":{"count":88,"last_updated":"2026-04-04 20:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2004-04-05/pdf/04-7290.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2004-04-05","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2004/04/05/04-7290.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":"2011-11-12T11:16:19Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":17610,"subtype":null,"title":"Airworthiness Directives; Airbus Model A330, A340-200, and A340-300 Series Airplanes","toc_doc":"Airbus","toc_subject":"Airworthiness directives:","topics":[],"type":"Proposed Rule","volume":69}