{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for Hamilton Sundstrand Power Systems Models T-62T-46C12 and T-62T- 40C14 (APS 500R) APUs with fuel filter housing assembly, part numbers (P/Ns) 4951627, 4951960, or 4952039, installed. This proposed AD would require installation of a bracket to prevent a failed bypass button from protruding beyond the internal o-ring seal. This proposed AD results from reports of leaks caused by cracked bypass buttons that protruded beyond the o-ring seal. We are proposing this AD to prevent a fire or explosion caused by a fuel leak from a failed bypass button on the fuel filter housing.","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/2004/05/07/04-10430.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"69 FR 25525","comment_url":null,"comments_close_on":"2004-07-06","correction_of":null,"corrections":[],"dates":"We must receive any comments on this proposed AD by July 6, 2004.","disposition_notes":null,"docket_ids":["Docket No. 2003-NE-61-AD"],"dockets":[],"document_number":"04-10430","effective_on":null,"end_page":25526,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2004/05/07/04-10430.xml","html_url":"https://www.federalregister.gov/documents/2004/05/07/04-10430/airworthiness-directives-hamilton-sundstrand-power-systems-t-62t-series-auxiliary-power-units-apus","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/04-10430?publication_date=2004-05-07","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2004-05-07/04-10430/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":547,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2004-05-07/pdf/04-10430.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2004-05-07","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2004/05/07/04-10430.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":"2011-11-12T11:38:29Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":25525,"subtype":null,"title":"Airworthiness Directives; Hamilton Sundstrand Power Systems T-62T Series Auxiliary Power Units (APUs)","toc_doc":"Hamilton Sundstrand Power Systems","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Safety"],"type":"Proposed Rule","volume":69}