{"abstract":"This document proposes adopting a new airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 206L-4 helicopters. This proposal would require installing a high altitude tail rotor static stop yield indicator (indicator) to allow operators to detect excessive bending loads sustained by the tail rotor yoke. A preflight check of the indicator would also be required. This proposal is prompted by a determination that a tail rotor yoke with a high altitude rotor system is susceptible to a static and dynamic overload. Static overload could occur after the tail rotor yoke sustains an excessive bending load due to a strike from a ground vehicle. Dynamic overload could occur as a result of a hard landing. The actions specified by the proposed AD are intended to prevent failure of the tail rotor yoke in flight and subsequent loss of control of the helicopter.","action":"Notice of proposed rulemaking (NPRM).","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/2001/06/25/01-15797.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"66 FR 33649","comment_url":null,"comments_close_on":"2001-08-24","correction_of":null,"corrections":[],"dates":"Comments must be received on or before August 24, 2001.","disposition_notes":null,"docket_ids":["Docket No. 2000-SW-37-AD"],"dockets":[],"document_number":"01-15797","effective_on":null,"end_page":33651,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2001/06/25/01-15797.xml","html_url":"https://www.federalregister.gov/documents/2001/06/25/01-15797/airworthiness-directives-bell-helicopter-textron-canada-model-206l-4-helicopters","images":{"EP25JN01.000":{"large":"https://img.federalregister.gov/EP25JN01.000/EP25JN01.000_large.png","medium":"https://img.federalregister.gov/EP25JN01.000/EP25JN01.000_medium.png","original_size":"https://img.federalregister.gov/EP25JN01.000/EP25JN01.000_original_size.png"}},"images_metadata":{"EP25JN01.000":{"large":{"identifier":"EP25JN01.000","content_type":"image/png","size":17738,"width":822,"sha":"01520d3bfed20c9cebc29e5e1628da90","url":"https://img.federalregister.gov/EP25JN01.000/EP25JN01.000_large.png","height":662},"medium":{"identifier":"EP25JN01.000","content_type":"image/png","size":7310,"width":428,"sha":"53da1ca5477e8a39b0de05e18595d352","url":"https://img.federalregister.gov/EP25JN01.000/EP25JN01.000_medium.png","height":345},"original_size":{"identifier":"EP25JN01.000","content_type":"image/png","size":52661,"width":3241,"sha":"1b60b1b959ff67e94c94141047fb104b","url":"https://img.federalregister.gov/EP25JN01.000/EP25JN01.000_original_size.png","height":2610}}},"json_url":"https://www.federalregister.gov/api/v1/documents/01-15797?publication_date=2001-06-25","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2001-06-25/01-15797/mods.xml","not_received_for_publication":null,"page_length":3,"page_views":{"count":32,"last_updated":"2026-04-04 14:15:05 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2001-06-25/pdf/01-15797.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":null,"publication_date":"2001-06-25","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2001/06/25/01-15797.txt","regulation_id_number_info":{},"regulation_id_numbers":[],"regulations_dot_gov_info":{},"regulations_dot_gov_url":null,"significant":null,"signing_date":null,"start_page":33649,"subtype":null,"title":"Airworthiness Directives; Bell Helicopter Textron Canada Model 206L-4 Helicopters","toc_doc":"Bell","toc_subject":"Airworthiness directives:","topics":["Air transportation","Aircraft","Aviation safety","Safety"],"type":"Proposed Rule","volume":66}