{"abstract":"We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-600, -700, -700C, -800, -900, and -900ER series airplanes. This AD was prompted by significant changes made to the airworthiness limitations (AWL) related to fuel tank ignition prevention and the nitrogen generation system. This AD requires revision of the maintenance or inspection program, as applicable, to include the latest revision of the AWLs. We are issuing this AD to address the unsafe condition on these products.","action":"Final rule.","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/2018/10/15/2018-21971.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"83 FR 51815","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective November 19, 2018.","disposition_notes":null,"docket_ids":["Docket No. FAA-2017-0814","Product Identifier 2017-NM-066-AD","Amendment 39-19458","AD 2018-20-24"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supporting AD Documents","document_id":"FAA-2017-0814-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2018-10-15","updated_at":"2023-03-01T14:38:06.488-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2017-0814-0008","allow_late_comments":null,"id":"FAA-2017-0814-0008","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2017-0814","title":"2017-NM-XXX-AD"}],"document_number":"2018-21971","effective_on":"2018-11-19","end_page":51819,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2018/10/15/2018-21971.xml","html_url":"https://www.federalregister.gov/documents/2018/10/15/2018-21971/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2018-21971?publication_date=2018-10-15","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2018-10-15/2018-21971/mods.xml","not_received_for_publication":null,"page_length":5,"page_views":{"count":649,"last_updated":"2026-04-05 08:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2018-10-15/pdf/2018-21971.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2018-21971.pdf?1539348318","publication_date":"2018-10-15","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2018/10/15/2018-21971.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 - Supporting AD Documents","document_id":"FAA-2017-0814-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":0,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2017-0814","supporting_documents_count":1,"docket_id":"FAA-2017-0814","document_id":"FAA-2017-0814-0008","regulation_id_number":"2120-AA64","title":"2017-NM-XXX-AD","checked_regulationsdotgov_at":"2023-03-01T19:38:05Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":51815,"subtype":null,"title":"Airworthiness Directives; The Boeing Company Airplanes","toc_doc":"The Boeing Company Airplanes","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":83}