{"abstract":"The FAA proposes to adopt a new airworthiness directive (AD) for all Boeing Model 757 airplanes. This proposed AD would require revising the Airworthiness Limitations (AWLs) section of the Instructions for Continued Airworthiness by incorporating new limitations for fuel tank systems to satisfy Special Federal Aviation Regulation No. 88 requirements. The proposed AD also would require the initial inspection of certain repetitive inspections specified in the AWLs to phase-in those inspections, and repair if necessary. This proposed AD results from a design review of the fuel tank systems. We are proposing this AD to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs, or maintenance actions, 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/2007/01/03/E6-22469.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"72 FR 50","comment_url":null,"comments_close_on":"2007-02-20","correction_of":null,"corrections":[],"dates":"We must receive comments on this proposed AD by February 20, 2007.","disposition_notes":null,"docket_ids":["Docket No. FAA-2006-26710","Directorate Identifier 2006-NM-147-AD"],"dockets":[],"document_number":"E6-22469","effective_on":null,"end_page":55,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2007/01/03/E6-22469.xml","html_url":"https://www.federalregister.gov/documents/2007/01/03/E6-22469/airworthiness-directives-boeing-model-757-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E6-22469?publication_date=2007-01-03","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2007-01-03/E6-22469/mods.xml","not_received_for_publication":null,"page_length":6,"page_views":{"count":1171,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2007-01-03/pdf/E6-22469.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2007-01-03","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2007/01/03/E6-22469.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":"2011-11-12T20:29:26Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":50,"subtype":null,"title":"Airworthiness Directives; Boeing Model 757 Airplanes","toc_doc":"Boeing","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Safety"],"type":"Proposed Rule","volume":72}