{"abstract":"We propose to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 757 airplanes. This proposed AD was prompted by fuel system reviews conducted by the manufacturer. This proposed AD would require modifying the fuel quantity indication system (FQIS) wiring or fuel tank systems to prevent development of an ignition source inside the center fuel tank. We are proposing this AD to prevent ignition sources inside the center fuel tank, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.","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/2012/03/01/2012-4931.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"77 FR 12506","comment_url":"http://www.regulations.gov/commenton/FAA-2012-0187-0001","comments_close_on":"2012-04-30","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by April 30, 2012.","disposition_notes":null,"docket_ids":["Docket No. FAA-2012-0187","Directorate Identifier 2011-NM-094-AD"],"dockets":[],"document_number":"2012-4931","effective_on":null,"end_page":12508,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/03/01/2012-4931.xml","html_url":"https://www.federalregister.gov/documents/2012/03/01/2012-4931/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-4931?publication_date=2012-03-01","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-03-01/2012-4931/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":1303,"last_updated":"2026-10-22 18:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-03-01/pdf/2012-4931.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-04931.pdf?1330523393","publication_date":"2012-03-01","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/03/01/2012-4931.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 - Various Supplemental AD Documents","document_id":"FAA-2012-0187-0022"},{"title":"U.S. DOT/FAA- See Attachment","document_id":"FAA-2012-0187-0016"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-0187-0002"}],"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-2012-0187","supporting_documents_count":3,"docket_id":"FAA-2012-0187","regulation_id_number":"2120-AA64","title":"2011?NM?094?AD The Boeing Company Model 757 airplanes","checked_regulationsdotgov_at":"2023-03-01T19:47:07Z"},"regulations_dot_gov_url":"http://www.regulations.gov/commenton/FAA-2012-0187-0001","significant":false,"signing_date":null,"start_page":12506,"subtype":null,"title":"Airworthiness Directives; The Boeing Company Airplanes","toc_doc":"Boeing Co. Airplanes","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":77}