{"abstract":"We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires repetitive detailed inspections for disbonding and tearing and measurements for wear of the internal diameter (ID) of the Karon-lined bushings of the bulkhead support jackscrew fitting and of the jackscrew fitting of the horizontal stabilizer; and reinstallation of the horizontal stabilizer trim actuator (HSTA) after inspection and measurement; and if necessary, replacement of the bushings with new bushings and all applicable related investigative and corrective actions. This AD was prompted by a report indicating that a Karon-lined bushing with the liner broken into five pieces was found during a scheduled inspection of the HSTA components; the broken liner had worn and disbonded from the bushing. We are issuing this AD to detect and correct discrepancies of the HSTA attachment locations, which could result in reduced structural integrity of the horizontal stabilizer and consequent loss of controllability of the airplane.","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/2011/03/10/2011-5086.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"76 FR 13074","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective April 14, 2011.","disposition_notes":null,"docket_ids":["Docket No. FAA-2010-1156","Directorate Identifier 2010-NM-128-AD","Amendment 39-16622","AD 2011-05-12"],"dockets":[],"document_number":"2011-5086","effective_on":"2011-04-14","end_page":13075,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2011/03/10/2011-5086.xml","html_url":"https://www.federalregister.gov/documents/2011/03/10/2011-5086/airworthiness-directives-the-boeing-company-model-777-200--200lr--300-and--300er-series-airplanes","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2011-5086?publication_date=2011-03-10","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2011-03-10/2011-5086/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":109,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2011-03-10/pdf/2011-5086.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2011-03-10","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2011/03/10/2011-5086.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 Attachment","document_id":"FAA-2010-1156-0009"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2010-1156-0008"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2010-1156-0007"},{"title":"U.S. DOT/FAA - See Attachment","document_id":"FAA-2010-1156-0006"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2010-1156-0002"}],"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-2010-1156","supporting_documents_count":5,"docket_id":"FAA-2010-1156","regulation_id_number":"2120-AA64","title":"2010–NM–128–AD\r\nThe Boeing Company Model 777–200, –200LR,\r\n–300, and –300ER Series Airplanes","checked_regulationsdotgov_at":"2011-03-30T08:05:00Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":13074,"subtype":null,"title":"Airworthiness Directives; The Boeing Company Model 777-200, -200LR, -300, and -300ER Series Airplanes","toc_doc":"Boeing Co. Model 777200, 200LR, 300, and 300ER Series Airplanes","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":76}