{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 777 airplanes. This AD was prompted by a report of a crack found in a front spar lower chord undergoing an underwing longeron replacement. This AD requires repetitive inspections for cracking of the left and right side ring chords, repair angles, front spar lower chords, and front spar webs (depending on configuration) common to the underwing longeron located at station (STA) 1035; modification of the front spar lower chord for some airplanes; repetitive post-modification inspections; and applicable on-condition actions. The FAA is 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/2022/09/26/2022-20773.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"87 FR 58259","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective October 31, 2022.","disposition_notes":null,"docket_ids":["Docket No. FAA-2022-0154","Project Identifier AD-2021-01153-T","Amendment 39-22162","AD 2022-18-11"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Document","document_id":"FAA-2022-0154-0010"},{"title":"Boeing 777-57A0122 RB, October 8, 2021","document_id":"FAA-2022-0154-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2022-09-26","updated_at":"2023-02-27T17:17:08.954-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2022-0154-0009","allow_late_comments":null,"id":"FAA-2022-0154-0009","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2022-0154","title":"AD-2021-01153-T The Boeing Company Model 777 airplanes; front spar lower chord"}],"document_number":"2022-20773","effective_on":"2022-10-31","end_page":58263,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2022/09/26/2022-20773.xml","html_url":"https://www.federalregister.gov/documents/2022/09/26/2022-20773/airworthiness-directives-the-boeing-company-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2022-20773?publication_date=2022-09-26","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2022-09-26/2022-20773/mods.xml","not_received_for_publication":null,"page_length":5,"page_views":{"count":830,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2022-09-26/pdf/2022-20773.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2022-20773.pdf?1663937128","publication_date":"2022-09-26","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2022/09/26/2022-20773.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 - Supplemental AD Document","document_id":"FAA-2022-0154-0010"},{"title":"Boeing 777-57A0122 RB, October 8, 2021","document_id":"FAA-2022-0154-0002"}],"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-2022-0154","supporting_documents_count":2,"docket_id":"FAA-2022-0154","document_id":"FAA-2022-0154-0009","regulation_id_number":"2120-AA64","title":"AD-2021-01153-T The Boeing Company Model 777 airplanes; front spar lower chord","checked_regulationsdotgov_at":"2023-02-27T22:17:08Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":58259,"subtype":null,"title":"Airworthiness Directives; The Boeing Company Airplanes","toc_doc":"The Boeing Company Airplanes","toc_subject":"Airworthiness Directives:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":87}