{"abstract":"The FAA proposes to supersede Airworthiness Directive (AD) 2019-16-09, which applies to certain De Havilland Aircraft of Canada Limited Model DHC-8-400 series airplanes. AD 2019-16-09 requires one- time inspections for cracks and damage of the elevator power control unit (PCU) brackets and surrounding area, horizontal stabilizer rear spar, and elevator front spar, and related investigative and corrective actions if necessary. Since the FAA issued AD 2019-16-09, new findings have been reported as a result of maintenance activities and/or inspections. This proposed AD would continue to require certain actions in AD 2019-16-09, and would also require repeating the inspections one time and performing applicable on-condition actions, remove an airplane from the applicability, and provide optional terminating action for the repetitive inspections. The FAA is proposing this AD to address the unsafe condition on these products.","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/2025/06/23/2025-11417.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"90 FR 26466","comment_url":null,"comments_close_on":"2025-08-07","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this proposed AD by August 7, 2025.","disposition_notes":null,"docket_ids":["Docket No. FAA-2025-0482","Project Identifier MCAI-2024-00152-T"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-0482-0005"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-0482-0002"}],"agency_name":"FAA","documents":[{"comment_count":1,"comment_start_date":"2025-06-23","updated_at":"2025-08-08T00:03:01.926-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2025-0482-0001","allow_late_comments":false,"id":"FAA-2025-0482-0001","comment_end_date":"2025-08-08","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2025-0482","title":"MCAI-2024-00152-T; De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 airplanes; elevator power control unit (PCU) brackets, horizontal stabilizer rear spar, and elevator front spar."}],"document_number":"2025-11417","effective_on":null,"end_page":26469,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/06/23/2025-11417.xml","html_url":"https://www.federalregister.gov/documents/2025/06/23/2025-11417/airworthiness-directives-de-havilland-aircraft-of-canada-limited-type-certificate-previously-held-by","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-11417?publication_date=2025-06-23","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-06-23/2025-11417/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":112,"last_updated":"2026-04-04 20:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-06-23/pdf/2025-11417.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-11417.pdf?1750423512","publication_date":"2025-06-23","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/06/23/2025-11417.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-2025-0482-0005"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-0482-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":1,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2025-0482","supporting_documents_count":2,"docket_id":"FAA-2025-0482","document_id":"FAA-2025-0482-0001","regulation_id_number":"2120-AA64","title":"MCAI-2024-00152-T; De Havilland Aircraft of Canada Limited DHC-8-401 and DHC-8-402 airplanes; elevator power control unit (PCU) brackets, horizontal stabilizer rear spar, and elevator front spar.","checked_regulationsdotgov_at":"2025-08-08T04:03:01Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":26466,"subtype":null,"title":"Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes","toc_doc":"De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":90}