{"abstract":"The FAA is adopting a new airworthiness directive (AD) for all aircraft equipped with certain Aerospace & Defense Oxygen Systems SaS portable breathing equipment (PBE). This AD was prompted by reports of occurrences of incorrect usage of certain PBEs. This AD requires incorporating revised procedures for donning the PBE. 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/2025/12/09/2025-22338.html","cfr_references":[{"chapter":null,"citation_url":null,"part":"39","title":14}],"citation":"90 FR 56990","comment_url":null,"comments_close_on":"2026-01-23","correction_of":null,"corrections":[],"dates":"This AD is effective December 24, 2025.","disposition_notes":null,"docket_ids":["Docket No. FAA-2025-5041","Project Identifier MCAI-2025-01620-Q","Amendment 39-23210","AD 2025-25-02"],"dockets":[{"supporting_documents":[{"title":"U.S. DOT/FAA - Supplemental AD Document","document_id":"FAA-2025-5041-0003"},{"title":"U.S. DOT/FAA - Supplemental AD Document","document_id":"FAA-2025-5041-0002"}],"agency_name":"FAA","documents":[{"comment_count":7,"comment_start_date":"2025-12-09","updated_at":"2025-12-30T00:56:12.382-05:00","comment_url":"https://www.regulations.gov/commenton/FAA-2025-5041-0001","allow_late_comments":false,"id":"FAA-2025-5041-0001","comment_end_date":"2025-12-24","regulations_dot_gov_open_for_comment":false}],"supporting_documents_count":2,"id":"FAA-2025-5041","title":"MCAI-2025-01620-T; Aerospace & Defense Oxygen Systems SaS; portable breathing equipment (PBE)"}],"document_number":"2025-22338","effective_on":"2025-12-24","end_page":56993,"executive_order_notes":null,"executive_order_number":null,"full_text_xml_url":"https://www.federalregister.gov/documents/full_text/xml/2025/12/09/2025-22338.xml","html_url":"https://www.federalregister.gov/documents/2025/12/09/2025-22338/airworthiness-directives-aerospace-and-defense-oxygen-systems-sas-part-of-safran-aerosystems","images":{},"images_metadata":{},"json_url":"https://www.federalregister.gov/api/v1/documents/2025-22338?publication_date=2025-12-09","mods_url":"https://www.govinfo.gov/metadata/granule/FR-2025-12-09/2025-22338/mods.xml","not_received_for_publication":null,"page_length":4,"page_views":{"count":663,"last_updated":"2026-09-21 20:15:12 -0400"},"pdf_url":"https://www.govinfo.gov/content/pkg/FR-2025-12-09/pdf/2025-22338.pdf","presidential_document_number":null,"proclamation_number":null,"public_inspection_pdf_url":"https://public-inspection.federalregister.gov/2025-22338.pdf?1764969308","publication_date":"2025-12-09","raw_text_url":"https://www.federalregister.gov/documents/full_text/text/2025/12/09/2025-22338.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 Document","document_id":"FAA-2025-5041-0003"},{"title":"U.S. DOT/FAA - Supplemental AD Document","document_id":"FAA-2025-5041-0002"}],"regulatory_plan":{"html_url":"https://www.federalregister.gov/regulations/2120-AA64/airworthiness-directives","title":"Airworthiness Directives"},"comments_count":7,"agency_id":"FAA","comments_url":"https://www.regulations.gov/docketBrowser?rpp=50&so=DESC&sb=postedDate&po=0&dct=PS&D=FAA-2025-5041","supporting_documents_count":2,"docket_id":"FAA-2025-5041","document_id":"FAA-2025-5041-0001","regulation_id_number":"2120-AA64","title":"MCAI-2025-01620-T; Aerospace & Defense Oxygen Systems SaS; portable breathing equipment (PBE)","checked_regulationsdotgov_at":"2025-12-31T09:55:04Z"},"regulations_dot_gov_url":null,"significant":false,"signing_date":null,"start_page":56990,"subtype":null,"title":"Airworthiness Directives; Aerospace & Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide)","toc_doc":"Aerospace and Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide)","toc_subject":"Airworthiness Directives","topics":["Air transportation","Aircraft","Aviation safety","Incorporation by reference","Safety"],"type":"Rule","volume":90}