{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 737-8 and 737-9 (737 MAX) airplanes. This AD was prompted by the determination that additional Certification Maintenance Requirements (CMRs) are necessary. This AD requires a revision of the existing maintenance or inspection program to incorporate three additional CMRs. The FAA is issuing this AD to address the unsafe condition on these products.","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/2021/06/23/2021-13458.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"86 FR 32735","comment_url":"https://www.regulations.gov/commenton/FAA-2021-0013-0001","comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective July 8, 2021.","disposition_notes":null,"docket_ids":["Docket No. FAA-2021-0013","Project Identifier AD-2021-00087-T","Amendment 39-21540","AD 2021-10-07"],"dockets":[{"supporting_documents":[],"agency_name":"FAA","documents":[{"comment_count":4,"comment_start_date":"2021-06-23","updated_at":"2024-11-06T20:32:36.188-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2021-0013-0001","allow_late_comments":true,"id":"FAA-2021-0013-0001","comment_end_date":"2021-08-10","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":0,"id":"FAA-2021-0013","title":"AD-2021-00087-T:The Boeing Company Model 737-8 and -9 airplanes; new Certificate Maintenance Requirements (CMRs)"}],"document_number":"2021-13458","effective_on":"2021-07-08","end_page":32737,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/06/23/2021-13458.xml","html_url":"https://www.federalregister.gov/documents/2021/06/23/2021-13458/airworthiness-directives-the-boeing-company-airplanes","images":{"ER23JN21.020":{"large":"https://img.federalregister.gov/ER23JN21.020/ER23JN21.020_large.png","original_size":"https://img.federalregister.gov/ER23JN21.020/ER23JN21.020_original_size.png"}},"images_metadata":{"ER23JN21.020":{"large":{"identifier":"ER23JN21.020","content_type":"image/png","size":27159,"width":823,"sha":"611582422bf33f67fb7e46d2e79ef793","url":"https://img.federalregister.gov/ER23JN21.020/ER23JN21.020_large.png","height":293},"original_size":{"identifier":"ER23JN21.020","content_type":"image/png","size":18599,"width":3604,"sha":"06324083dfad43f525e6e345585251fd","url":"https://img.federalregister.gov/ER23JN21.020/ER23JN21.020_original_size.png","height":1282}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-13458?publication_date=2021-06-23","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-06-23/2021-13458/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":792,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-06-23/pdf/2021-13458.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-13458.pdf?1624306526","publication_date":"2021-06-23","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/06/23/2021-13458.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":[],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":4,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2021-0013","supporting_documents_count":0,"docket_id":"FAA-2021-0013","document_id":"FAA-2021-0013-0001","regulation_id_number":"2120-AA64","title":"AD-2021-00087-T:The Boeing Company Model 737-8 and -9 airplanes; 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