{"abstract":"This amendment adopts a new airworthiness directive (AD) for Enstrom Helicopter Corporation (Enstrom) Model F-28A, F-28C, F-28F, TH- 28, 280, 280C, 280F, 280FX, 480, and 480B helicopters that requires determining the installation dates for each main rotor push-pull control rod (push-pull rod), inspecting the push-pull rods for corrosion, replacing any push-pull rod which has corrosion that is severe enough to cause pitting, or has visible moisture inside the rod, and repairing each push-pull rod that has corrosion but no pitting. This amendment is prompted by one reported incident in which the helicopter pilot encountered severe in-flight vibration due to the failure of a push-pull rod, requiring an emergency landing. The actions specified by this AD are intended to detect corrosion and prevent failure of a push-pull rod, and subsequent loss of control of the helicopter.","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/2007/08/28/E7-16770.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"72 FR 49177","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"Effective October 2, 2007.","disposition_notes":null,"docket_ids":["Docket No. FAA-2006-26771","Directorate Identifier 2005-SW-07-AD","Amendment 39-15059","AD 2007-11-02"],"dockets":[],"document_number":"E7-16770","effective_on":"2007-10-02","end_page":49180,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2007/08/28/E7-16770.xml","html_url":"https://www.federalregister.gov/documents/2007/08/28/E7-16770/airworthiness-directives-enstrom-helicopter-corporation-model-f-28a-f-28c-f-28f-th-28-280-280c-280f","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/E7-16770?publication_date=2007-08-28","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2007-08-28/E7-16770/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":59,"last_updated":"2026-04-04 16:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2007-08-28/pdf/E7-16770.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2007-08-28","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2007/08/28/E7-16770.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202504","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202504&RIN=2120-AA64&operation=OPERATION_EXPORT_XML","priority_category":"Routine and Frequent"}},"regulation_id_numbers":["2120-AA64"],"regulations_dot_gov_info":{"checked_regulationsdotgov_at":"2011-11-12T23:29:43Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":49177,"subtype":null,"title":"Airworthiness Directives; Enstrom Helicopter Corporation Model F-28A, F-28C, F-28F, TH-28, 280, 280C, 280F, 280FX, 480, and 480B Helicopters","toc_doc":"Enstrom Helicopter Corp.","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":72}