{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 747-400 series airplanes. This proposed AD was prompted by a report of a certain modification that causes interference with inspections that are intended to detect fatigue cracks. This proposed AD would require repetitive low frequency eddy current (LFEC) inspections of a certain fuselage upper skin lap splice for cracks, repetitive high frequency eddy current (HFEC) inspections of a certain fuselage upper skin lap splice for cracks, and applicable on-condition actions. The FAA is proposing this AD to address the unsafe condition on these products.","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/2019/11/26/2019-25574.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"84 FR 65034","comment_url":null,"comments_close_on":"2020-01-10","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this proposed AD by January 10, 2020.","disposition_notes":null,"docket_ids":["Docket No. FAA-2019-0875","Product Identifier 2019-NM-143-AD"],"dockets":[{"supporting_documents":[{"title":"Supporting AD Documents","document_id":"FAA-2019-0875-0002"}],"agency_name":"FAA","documents":[{"comment_count":1,"comment_start_date":"2019-11-26","updated_at":"2023-03-01T02:52:20.342-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2019-0875-0001","allow_late_comments":null,"id":"FAA-2019-0875-0001","comment_end_date":"2020-01-11","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2019-0875","title":"2019‑NM‑143‑AD\nThe Boeing Company Model 747‑400 series airplanes"}],"document_number":"2019-25574","effective_on":null,"end_page":65036,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2019/11/26/2019-25574.xml","html_url":"https://www.federalregister.gov/documents/2019/11/26/2019-25574/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2019-25574?publication_date=2019-11-26","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2019-11-26/2019-25574/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":143,"last_updated":"2026-09-21 04:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2019-11-26/pdf/2019-25574.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2019-25574.pdf?1574689515","publication_date":"2019-11-26","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2019/11/26/2019-25574.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":"Supporting AD Documents","document_id":"FAA-2019-0875-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":1,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2019-0875","supporting_documents_count":1,"docket_id":"FAA-2019-0875","document_id":"FAA-2019-0875-0001","regulation_id_number":"2120-AA64","title":"2019‑NM‑143‑AD\nThe Boeing Company Model 747‑400 series airplanes","checked_regulationsdotgov_at":"2023-03-01T07:52:19Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":65034,"subtype":null,"title":"Airworthiness Directives; The Boeing Company Airplanes","toc_doc":"The Boeing Company Airplanes","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":84}