{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-8 and Model 737-9 airplanes. This AD was prompted by a Boeing review of the standby power system control unit (SPCU) design where a single point of failure exists internal to the SPCU. This AD requires installing four diodes and changing wire bundles in the P5 panel, as well as performing installation and power tests and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.","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/2024/10/22/2024-24369.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"89 FR 84264","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective November 26, 2024 .","disposition_notes":null,"docket_ids":["Docket No. FAA-2024-0229","Project Identifier AD-2023-00485-T","Amendment 39-22848","AD 2024-19-06"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-0229-0004"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2024-10-22","updated_at":"2024-10-22T09:05:35.457-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2024-0229-0013","allow_late_comments":false,"id":"FAA-2024-0229-0013","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2024-0229","title":"AD-2023-00485-T; The Boeing Company Model 737-8 and Model 737-9 airplanes; standby power system control unit"}],"document_number":"2024-24369","effective_on":"2024-11-26","end_page":84267,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2024/10/22/2024-24369.xml","html_url":"https://www.federalregister.gov/documents/2024/10/22/2024-24369/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2024-24369?publication_date=2024-10-22","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2024-10-22/2024-24369/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":323,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2024-10-22/pdf/2024-24369.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2024-24369.pdf?1729514730","publication_date":"2024-10-22","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2024/10/22/2024-24369.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202410","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202410&RIN=2120-AA64&operation=OPERATION_EXPORT_XML","priority_category":"Routine and Frequent"}},"regulation_id_numbers":["2120-AA64"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2024-0229-0004"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":0,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2024-0229","supporting_documents_count":1,"docket_id":"FAA-2024-0229","document_id":"FAA-2024-0229-0013","regulation_id_number":"2120-AA64","title":"AD-2023-00485-T; The Boeing Company Model 737-8 and Model 737-9 airplanes; standby power system control unit","checked_regulationsdotgov_at":"2024-10-23T12:00:15Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":84264,"subtype":null,"title":"Airworthiness Directives; The Boeing Company Airplanes","toc_doc":"The Boeing Company Airplanes","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":89}