{"abstract":"We are adopting a new airworthiness directive (AD) for all The Boeing Company Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD was prompted by reports of cracks found in the rear spar web and lower chord on the left and right wings. This AD requires repetitive detailed inspections for cracking of the rear spar web and lower chord, and applicable on-condition actions. 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/2018/06/08/2018-12279.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"83 FR 26556","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective July 13, 2018.","disposition_notes":null,"docket_ids":["Docket No. FAA-2018-0074","Product Identifier 2017-NM-148-AD","Amendment 39-19309","AD 2018-12-05"],"dockets":[{"supporting_documents":[{"title":"Supporting AD Documents","document_id":"FAA-2018-0074-0003"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2018-06-08","updated_at":"2023-03-01T14:36:08.207-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2018-0074-0006","allow_late_comments":null,"id":"FAA-2018-0074-0006","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2018-0074","title":"2017-NM-148-AD\nThe Boeing Company Model 737‑100, ‑200, ‑200C, ‑300, ‑400, and ‑500 series airplanes"}],"document_number":"2018-12279","effective_on":"2018-07-13","end_page":26559,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2018/06/08/2018-12279.xml","html_url":"https://www.federalregister.gov/documents/2018/06/08/2018-12279/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2018-12279?publication_date=2018-06-08","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2018-06-08/2018-12279/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":457,"last_updated":"2026-04-04 12:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2018-06-08/pdf/2018-12279.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2018-12279.pdf?1528375519","publication_date":"2018-06-08","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2018/06/08/2018-12279.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":"Supporting AD Documents","document_id":"FAA-2018-0074-0003"}],"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-2018-0074","supporting_documents_count":1,"docket_id":"FAA-2018-0074","document_id":"FAA-2018-0074-0006","regulation_id_number":"2120-AA64","title":"2017-NM-148-AD\nThe Boeing Company Model 737‑100, ‑200, ‑200C, ‑300, ‑400, and ‑500 series airplanes","checked_regulationsdotgov_at":"2023-03-01T19:36:07Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":26556,"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}