{"abstract":"We propose to adopt a new airworthiness directive (AD) for all BAE SYSTEMS (Operations) Limited Model 4101 airplanes. This proposed AD was prompted by reports of cracking found in the wing rear spar. This proposed AD would require a one-time detailed inspection for cracks, corrosion, and other defects of the rear face of the wing rear spar, and repair if necessary. We are proposing this AD to detect and correct cracking in the rear spar, which could propagate to a critical length, possibly affecting the structural integrity of the area and resulting in a fuel tank rupture, with consequent damage to the airplane and possible injury to its occupants.","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/2012/03/06/2012-5379.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"77 FR 13228","comment_url":"http://www.regulations.gov/commenton/FAA-2012-0188-0001","comments_close_on":"2012-04-20","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by April 20, 2012.","disposition_notes":null,"docket_ids":["Docket No. FAA-2012-0188","Directorate Identifier 2011-NM-120-AD"],"dockets":[],"document_number":"2012-5379","effective_on":null,"end_page":13230,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/03/06/2012-5379.xml","html_url":"https://www.federalregister.gov/documents/2012/03/06/2012-5379/airworthiness-directives-bae-systems-operations-limited-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-5379?publication_date=2012-03-06","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-03-06/2012-5379/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":21,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-03-06/pdf/2012-5379.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-05379.pdf?1330955381","publication_date":"2012-03-06","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/03/06/2012-5379.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 - See Attachments","document_id":"FAA-2012-0188-0005"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2012-0188-0004"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-0188-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2012-0188","supporting_documents_count":3,"docket_id":"FAA-2012-0188","regulation_id_number":"2120-AA64","title":"2011-NM-120-AD\r\nBAE Systems (Operations) Limited Model 4101 airplanes","checked_regulationsdotgov_at":"2023-03-01T19:17:15Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/FAA-2012-0188-0001","significant":false,"signing_date":null,"start_page":13228,"subtype":null,"title":"Airworthiness Directives; BAE SYSTEMS (Operations) Limited Airplanes","toc_doc":"BAE SYSTEMS (Operations) Limited Airplanes","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":77}