{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain MHI RJ Aviation ULC (type certificate previously held by Bombardier, Inc.) Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2C11 (Regional Jet Series 550), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by reports of loose and missing bolts on the horizontal stabilizer (H-stab) anti- yaw steady fitting block. This AD requires repetitive torque checks of the H-stab anti-yaw steady fitting block bolts. The FAA is issuing this AD to address the unsafe condition on these products.","action":"Final rule; request for comments.","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/2025/11/05/2025-19784.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"90 FR 49251","comment_url":null,"comments_close_on":"2025-12-22","correction_of":null,"corrections":[],"dates":"This AD is effective November 20, 2025.","disposition_notes":null,"docket_ids":["Docket No. FAA-2025-3995","Project Identifier MCAI-2025-01653-T","Amendment 39-23180","AD 2025-22-02"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-3995-0004"}],"agency_name":"FAA","documents":[{"comment_count":5,"comment_start_date":"2025-11-05","updated_at":"2025-12-23T00:04:07.027-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2025-3995-0001","allow_late_comments":false,"id":"FAA-2025-3995-0001","comment_end_date":"2025-12-23","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":1,"id":"FAA-2025-3995","title":"MCAI-2025-01653-T; MHI RJ Aviation ULC Model CL-600 airplanes; loose and missing bolts on the horizontal stabilizer (H-stab) anti-yaw steady fitting block"}],"document_number":"2025-19784","effective_on":"2025-11-20","end_page":49254,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/11/05/2025-19784.xml","html_url":"https://www.federalregister.gov/documents/2025/11/05/2025-19784/airworthiness-directives-mhi-rj-aviation-ulc-type-certificate-previously-held-by-bombardier-inc","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-19784?publication_date=2025-11-05","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-11-05/2025-19784/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":678,"last_updated":"2026-08-26 18:15:08 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-11-05/pdf/2025-19784.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-19784.pdf?1762177508","publication_date":"2025-11-05","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/11/05/2025-19784.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":{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-3995-0004"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":5,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2025-3995","supporting_documents_count":1,"docket_id":"FAA-2025-3995","document_id":"FAA-2025-3995-0001","regulation_id_number":"2120-AA64","title":"MCAI-2025-01653-T; MHI RJ Aviation ULC Model CL-600 airplanes; loose and missing bolts on the horizontal stabilizer (H-stab) anti-yaw steady fitting block","checked_regulationsdotgov_at":"2025-12-24T09:55:03Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":49251,"subtype":null,"title":"Airworthiness Directives; MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes","toc_doc":"MHI RJ Aviation ULC (Type Certificate Previously Held by Bombardier, Inc.) Airplanes","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":90}