{"abstract":"This final rule amends FAA regulations that require operators and manufacturers of transport category airplanes to take steps that, in combination with other required actions, should greatly reduce the chances of a catastrophic fuel tank explosion. The final rule does not direct the adoption of specific inerting technology either by manufacturers or operators, but establishes a performance-based set of requirements that set acceptable flammability exposure values in tanks most prone to explosion or require the installation of an ignition mitigation means in an affected fuel tank. Technology now provides a variety of commercially feasible methods to accomplish these vital safety objectives.","action":"Final rule, request for comments.","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/2008/07/21/E8-16084.html","cfr_references":[{"chapter":null,"citation_url":null,"part":25,"title":14},{"chapter":null,"citation_url":null,"part":26,"title":14},{"chapter":null,"citation_url":null,"part":121,"title":14},{"chapter":null,"citation_url":null,"part":125,"title":14},{"chapter":null,"citation_url":null,"part":129,"title":14}],"citation":"73 FR 42444","comment_url":null,"comments_close_on":"2008-09-19","correction_of":null,"corrections":[],"dates":"These amendments become September 19, 2008. Send your comments by January 20, 2009. The incorporation by reference of the document listed in the rule is approved by the Director of the Federal Register as of September 19, 2008.","disposition_notes":null,"docket_ids":["Docket No. FAA-2005-22997","Amendment Nos. 25-125, 26-2, 121-340, 125-55, and 129-46"],"dockets":[],"document_number":"E8-16084","effective_on":null,"end_page":42504,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2008/07/21/E8-16084.xml","html_url":"https://www.federalregister.gov/documents/2008/07/21/E8-16084/reduction-of-fuel-tank-flammability-in-transport-category-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E8-16084?publication_date=2008-07-21","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2008-07-21/E8-16084/mods.xml","not_received_for_publication":null,"page_length":61,"page_views":{"count":2915,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2008-07-21/pdf/E8-16084.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2008-07-21","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2008/07/21/E8-16084.txt","regulation_id_number_info":{"2120-AI23":{"issue":"200804","html_url":"https://www.federalregister.gov/regulations/2120-AI23/transport-airplane-fuel-tank-flammability-reduction","title":"Transport Airplane Fuel Tank Flammability Reduction","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=200804&RIN=2120-AI23&operation=OPERATION_EXPORT_XML","priority_category":"Economically Significant"}},"regulation_id_numbers":["2120-AI23"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"U.S. DOT/FAA - Appendices to Initial Regulatory Evaluation, Initial Regulatory Flexibility Determination, Initial International Trade Impact Assessment, and Initial Unfunded Mandate Assessment","document_id":"FAA-2005-22997-0003"},{"title":"U.S. DOT/FAA - Initial Regulatory Evaluation, Initial Regulatory Flexibility Determination, Initial International Trade Impact, Assessment, and Initial Unfunded Mandate Assessment","document_id":"FAA-2005-22997-0002"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2005-22997","supporting_documents_count":2,"docket_id":"FAA-2005-22997","regulation_id_number":null,"title":"Reduction of Fuel Tank Flammability in Transport Category Airplanes","checked_regulationsdotgov_at":"2011-11-14T12:05:07Z"},"regulations_dot_gov_url":null,"significant":true,"signing_date":null,"start_page":42444,"subtype":null,"title":"Reduction of Fuel Tank Flammability in Transport Category Airplanes","toc_doc":"Reduction of Fuel Tank Flammability in Transport Category Airplanes","toc_subject":null,"topics":["Air carriers","Aircraft","Aviation safety","Incorporation by reference","Reporting and recordkeeping requirements","Safety","Security measures","Transportation"],"type":"Rule","volume":73}