{"abstract":"We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-100, -200, and -200C series airplanes. This AD was prompted by a report of a severed upper butt strap, and cracks in the forward skin and bonded doubler, on one airplane. This AD requires repetitive inspections for cracks and a chemical spot test in the area of station (STA) 908, and related investigative and corrective actions, if necessary. For certain airplanes, this AD requires an inspection and modification. We are issuing this AD to prevent cracks at the adjacent mating skins (forward and aft), which could initiate just above stringers S-4R and S-4L; and could grow and result in a decompression event.","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/2012/10/05/2012-24280.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"77 FR 60889","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective November 9, 2012.","disposition_notes":null,"docket_ids":["Docket No. FAA-2012-0491","Directorate Identifier 2011-NM-265-AD","Amendment 39-17207","AD 2012-20-01"],"dockets":[],"document_number":"2012-24280","effective_on":"2012-11-09","end_page":60891,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2012/10/05/2012-24280.xml","html_url":"https://www.federalregister.gov/documents/2012/10/05/2012-24280/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2012-24280?publication_date=2012-10-05","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2012-10-05/2012-24280/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":41,"last_updated":"2026-05-11 10:15:15 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2012-10-05/pdf/2012-24280.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2012-24280.pdf?1349355277","publication_date":"2012-10-05","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2012/10/05/2012-24280.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 - See Attachments","document_id":"FAA-2012-0491-0005"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2012-0491-0002"}],"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-2012-0491","supporting_documents_count":2,"docket_id":"FAA-2012-0491","regulation_id_number":"2120-AA64","title":"2011-NM-265-AD The Boeing Company Model 737-100, -200, and -200C series airplanes","checked_regulationsdotgov_at":"2012-11-18T05:01:44Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":60889,"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":77}