{"abstract":"We are revising Airworthiness Directive (AD) 99-01-05 for certain aircraft equipped with wing lift struts. AD 99-01-05 required repetitively inspecting the wing lift struts for corrosion; repetitively inspecting the wing lift strut forks for cracks; replacing any corroded wing lift strut; replacing any cracked wing lift strut fork; and repetitively replacing the wing lift strut forks at a specified time for certain airplanes. AD 99-01-05 also required incorporating a \"NO STEP\" placard on the wing lift strut. Since we issued AD 99-01-05, we were informed that paragraph (c) had been misinterpreted and caused confusion. This AD clarifies the intent of the language in paragraph (c) of AD 99-01-05 and retains all other requirements of AD 99-01-05. We are issuing this AD to correct 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/2013/12/10/2013-29396.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"78 FR 73997","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective January 14, 2014.","disposition_notes":null,"docket_ids":["Docket No. FAA-2013-0023","Directorate Identifier 96-CE-072-AD","Amendment 39-17688","AD 99-01-05 R1"],"dockets":[],"document_number":"2013-29396","effective_on":"2014-01-14","end_page":74004,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2013/12/10/2013-29396.xml","html_url":"https://www.federalregister.gov/documents/2013/12/10/2013-29396/airworthiness-directives-various-aircraft-equipped-with-wing-lift-struts","images":{"ER10DE13.377":{"original_size":"https://img.federalregister.gov/ER10DE13.377/ER10DE13.377_original_size.png"}},"images_metadata":{"ER10DE13.377":{"original_size":{"identifier":"ER10DE13.377","content_type":"image/png","size":61798,"width":3615,"sha":"c39b2e06181c3a278bc76fb477ed9b97","url":"https://img.federalregister.gov/ER10DE13.377/ER10DE13.377_original_size.png","height":2184}}},"json_url":"https://www.federalregister.gov/api/v1/documents/2013-29396?publication_date=2013-12-10","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2013-12-10/2013-29396/mods.xml","not_received_for_publication":null,"page_length":8,"page_views":{"count":660,"last_updated":"2026-08-26 10:15:07 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2013-12-10/pdf/2013-29396.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2013-29396.pdf?1386597215","publication_date":"2013-12-10","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2013/12/10/2013-29396.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-2013-0023-0007"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2013-0023-0005"},{"title":"U.S. DOT/FAA - See Attachments","document_id":"FAA-2013-0023-0002"}],"comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2013-0023","supporting_documents_count":3,"docket_id":"FAA-2013-0023","regulation_id_number":null,"title":"96-CE-072-AD","checked_regulationsdotgov_at":"2013-12-30T06:00:13Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":73997,"subtype":null,"title":"Airworthiness Directives; Various Aircraft Equipped with Wing Lift Struts","toc_doc":"Various Aircraft Equipped with Wing Lift Struts","toc_subject":"Airworthiness Directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":78}