{"abstract":"The National Transportation Safety Board (NTSB) proposes amending the definition of \"Unmanned aircraft accident\" by removing the weight-based requirement and replacing it with an airworthiness certificate or airworthiness approval requirement. The weight threshold is no longer an appropriate criterion because unmanned aircraft systems (UAS) under 300 lbs. are operating in high-risk environments, such as beyond line-of-sight and over populated areas. The proposed definition will allow the NTSB to be notified of and quickly respond to UAS events with safety significance.","action":"Notice of proposed rulemaking (NPRM).","agencies":[{"raw_name":"NATIONAL TRANSPORTATION SAFETY BOARD","name":"National Transportation Safety Board","id":374,"url":"https://www.federalregister.gov/agencies/national-transportation-safety-board","json_url":"https://www.federalregister.gov/api/v1/agencies/374","parent_id":null,"slug":"national-transportation-safety-board"}],"body_html_url":"https://www.federalregister.gov/documents/full_text/html/2021/05/21/2021-09807.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"830","title":49}],"citation":"86 FR 27550","comment_url":null,"comments_close_on":"2021-07-20","correction_of":null,"corrections":[],"dates":"Send comments on or before July 20, 2021.","disposition_notes":null,"docket_ids":["Docket No.: NTSB-2021-0004"],"dockets":[{"supporting_documents":[{"title":"Definition of Unmanned Aircraft Accident","document_id":"NTSB-2021-0004-0014"},{"title":"Association for Unmanned Vehicle Systems International Members Briefing July 14 2021","document_id":"NTSB-2021-0004-0012"},{"title":"Definition of Unmanned Aircraft Accident","document_id":"NTSB-2021-0004-0001"}],"agency_name":null,"documents":[{"comment_count":11,"comment_start_date":"2021-05-21","updated_at":"2023-02-28T20:24:56.207-05:00","comment_url":"https://www.regulations.gov/commenton/NTSB-2021-0004-0001","allow_late_comments":null,"id":"NTSB-2021-0004-0001","comment_end_date":"2021-07-21","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":3,"id":"NTSB-2021-0004","title":"Reporting of Unmanned Aircraft System (UAS) Accidents"}],"document_number":"2021-09807","effective_on":null,"end_page":27551,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2021/05/21/2021-09807.xml","html_url":"https://www.federalregister.gov/documents/2021/05/21/2021-09807/amendment-to-the-definition-of-unmanned-aircraft-accident","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2021-09807?publication_date=2021-05-21","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2021-05-21/2021-09807/mods.xml","not_received_for_publication":null,"page_length":2,"page_views":{"count":2431,"last_updated":"2026-06-26 16:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2021-05-21/pdf/2021-09807.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2021-09807.pdf?1621514716","publication_date":"2021-05-21","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2021/05/21/2021-09807.txt","regulation_id_number_info":{"3147-AA20":{"issue":"202204","html_url":"https://www.federalregister.gov/regulations/3147-AA20/reporting-of-unmanned-aircraft-system-uas-accidents","title":"Reporting of Unmanned Aircraft System (UAS) Accidents","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202204&RIN=3147-AA20&operation=OPERATION_EXPORT_XML","priority_category":"Substantive, Nonsignificant"}},"regulation_id_numbers":["3147-AA20"],"regulations_dot_gov_info":{"supporting_documents":[{"title":"Definition of Unmanned Aircraft Accident","document_id":"NTSB-2021-0004-0014"},{"title":"Association for Unmanned Vehicle Systems International Members Briefing July 14 2021","document_id":"NTSB-2021-0004-0012"},{"title":"Definition of Unmanned Aircraft Accident","document_id":"NTSB-2021-0004-0001"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/3147-AA20/reporting-of-unmanned-aircraft-system-uas-accidents","title":"Reporting of Unmanned Aircraft System (UAS) Accidents"},"comments_count":11,"agency_id":"NTSB","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=NTSB-2021-0004","supporting_documents_count":3,"docket_id":"NTSB-2021-0004","document_id":"NTSB-2021-0004-0001","regulation_id_number":"3147-AA20","title":"Reporting of Unmanned Aircraft System (UAS) Accidents","checked_regulationsdotgov_at":"2023-03-01T01:24:55Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":27550,"subtype":null,"title":"Amendment to the Definition of Unmanned Aircraft Accident","toc_doc":"Definition of Unmanned Aircraft Accident","toc_subject":null,"topics":["Air transportation","Aviation safety","Investigations","Reporting and recordkeeping requirements","Safety"],"type":"Proposed Rule","volume":86}