{"abstract":"The FAA is adopting a new airworthiness directive (AD) for certain De Havilland Aircraft of Canada Limited Model DHC-8-401 and - 402 airplanes. This AD was prompted by reports of moisture in the wing- to-fuselage joint, between the mating front spar and rear spar frame segments. This AD requires a visual inspection of the fuselage front and rear spar frames, an ultrasonic test if applicable, other specified actions, and repair if necessary. The FAA is issuing this AD to address the unsafe condition on these products.","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/2024/07/17/2024-15657.html","cfr_references":[{"chapter":null,"citation_url":null,"part":39,"title":14}],"citation":"89 FR 58061","comment_url":null,"comments_close_on":null,"correction_of":null,"corrections":[],"dates":"This AD is effective August 21, 2024.","disposition_notes":null,"docket_ids":["Docket No. FAA-2023-1885","Project Identifier MCAI-2022-01484-T","Amendment 39-22770","AD 2024-12-06"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-1885-0006"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-1885-0002"}],"agency_name":"FAA","documents":[{"comment_count":0,"comment_start_date":"2024-07-17","updated_at":"2024-09-03T17:12:40.892-04:00","comment_url":"https://www.regulations.gov/commenton/FAA-2023-1885-0005","allow_late_comments":false,"id":"FAA-2023-1885-0005","comment_end_date":null,"regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2023-1885","title":"MCAI-2022-01484-T; De Havilland Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes; moisture in the wing-to-fuselage joint."}],"document_number":"2024-15657","effective_on":"2024-08-21","end_page":58064,"executive_order_notes":null,"executive_order_number":null,"explanation":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2024/07/17/2024-15657.xml","html_url":"https://www.federalregister.gov/documents/2024/07/17/2024-15657/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/2024-15657?publication_date=2024-07-17","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2024-07-17/2024-15657/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":68,"last_updated":"2026-04-04 18:15:03 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2024-07-17/pdf/2024-15657.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2024-15657.pdf?1721133927","publication_date":"2024-07-17","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2024/07/17/2024-15657.txt","regulation_id_number_info":{"2120-AA64":{"issue":"202410","html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives","xml_url":"http://www.reginfo.gov/public/do/eAgendaViewRule?pubId=202410&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-2023-1885-0006"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2023-1885-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":0,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2023-1885","supporting_documents_count":2,"docket_id":"FAA-2023-1885","document_id":"FAA-2023-1885-0005","regulation_id_number":"2120-AA64","title":"MCAI-2022-01484-T; De Havilland Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes; moisture in the wing-to-fuselage joint.","checked_regulationsdotgov_at":"2024-07-18T13:00:11Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":58061,"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:\n","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":89}