{"abstract":"The FAA proposes to supersede Airworthiness Directive (AD) 2024-04-06, which applies to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2024-04-06 requires repetitive operational checks of the gravity cross flow shut-off valve and, for certain airplanes, a one-time inspection of the motive flow fuel-feed tubes at the clamp blocks location, and applicable corrective action. Since the FAA issued AD 2024-04-06, the manufacturer developed additional corrective actions. This proposed AD would continue to require the actions in AD 2024-04-06 and would require replacement of the saddle clamp, inspection of the motive flow fuel-feed tubes, and applicable corrective actions. 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/2025/11/19/2025-20323.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"90 FR 52005","comment_url":null,"comments_close_on":"2026-01-05","correction_of":null,"corrections":[],"dates":"The FAA must receive comments on this proposed AD by January 5, 2026.","disposition_notes":null,"docket_ids":["Docket No. FAA-2025-5024","Project Identifier MCAI-2025-00797-T"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-5024-0007"},{"title":"U.S. DOT/FAA - Supplemental AD Documents","document_id":"FAA-2025-5024-0002"}],"agency_name":"FAA","documents":[{"comment_count":3,"comment_start_date":"2025-11-19","updated_at":"2026-01-10T03:56:21.879-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2025-5024-0001","allow_late_comments":false,"id":"FAA-2025-5024-0001","comment_end_date":"2026-01-06","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2025-5024","title":"MCAI-2025-00797-T; Airbus Canada Limited Partnership Model BD-500-1A10/-1A11 series airplanes; Motive Flow Fuel-feed Tubes Damaged at Bonding Clamp and Clamp Block Locations"}],"document_number":"2025-20323","effective_on":null,"end_page":52008,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/11/19/2025-20323.xml","html_url":"https://www.federalregister.gov/documents/2025/11/19/2025-20323/airworthiness-directives-airbus-canada-limited-partnership-type-certificate-previously-held-by-c","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-20323?publication_date=2025-11-19","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-11-19/2025-20323/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":147,"last_updated":"2026-08-25 04:15:04 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-11-19/pdf/2025-20323.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-20323.pdf?1763473517","publication_date":"2025-11-19","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/11/19/2025-20323.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-2025-5024-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":3,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2025-5024","supporting_documents_count":1,"docket_id":"FAA-2025-5024","document_id":"FAA-2025-5024-0001","regulation_id_number":"2120-AA64","title":"MCAI-2025-00797-T; Airbus Canada Limited Partnership Model BD-500-1A10/-1A11 series airplanes; Motive Flow Fuel-feed Tubes Damaged at Bonding Clamp and Clamp Block Locations","checked_regulationsdotgov_at":"2026-01-11T12:55:03Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":52005,"subtype":null,"title":"Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes","toc_doc":"Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Proposed Rule","volume":90}