2026-03-09: Oxygen

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2026-03-09 Aerospace & Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide): Amendment 39-23258; Docket No. FAA-2026-0744; Project Identifier MCAI-2026-00001-Q. (a) Effective Date This airworthiness directive (AD) is effective March 12, 2026. (b) Affected ADs None. (c) Applicability This AD applies to Aerospace & Defense Oxygen Systems SaS (part of Safran Aerosystems) (formerly known as Air Liquide) portable breathing equipment (PBE), part number (P/N) 15-40F-11 and P/N 15-40F-80, having a manufacturing date between March 2015 and March 2017 (inclusive), and having a serial number listed in Appendix A (modified January 5, 2026, 8:51 p.m. UTC+01:00) of Safran Aerosystems Service Bulletin 1540F-35-002, Revision 01, dated January 5, 2026. These PBE are eligible for installation on any aircraft and may have been installed during the aircraft manufacturing process (production line), or in-service modification, either through a supplemental type certificate, or using type certificate holder (TCH) approved modification instructions, or through a non-TCH modification approval. (d) Subject Air Transport Association (ATA) of America Code 35, Oxygen. (e) Unsafe Condition This AD was prompted by reports of occurrences of PBE not delivering oxygen once donned. Following investigation, a manufacturing issue has been identified, affecting certain PBE. The FAA is issuing this AD to address affected PBE. The unsafe condition, if not addressed, could lead to flight or cabin crewmember incapacitation, possibly affecting crewmember capability to accomplish tasks during an emergency, or resulting in fatal injury to that crewmember. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency (EASA) AD 2025-0297, dated December 23, 2025 (EASA AD 2025-0297). (h) Exceptions to EASA AD 2025-0297 (1) Where EASA AD 2025-0297 refers to its effective date, this AD requires using the effective date of this AD. (2) Where the definition of affected PBE in EASA AD 2025-0297 specifies "having manufacturing date between November 2015 and March 2017 (inclusive), and a s/n as listed in Appendix A of the SB", this AD requires replacing that text with "having a manufacturing date between March 2015 and March 2017 (inclusive), and a serial number listed in Appendix A (modified January 5, 2026, 8:51 p.m. UTC+01:00) of Safran Aerosystems Service Bulletin 1540F-35-002, Revision 01, dated January 5, 2026". (3) Where paragraph (1) of EASA AD 2025-0297 specifies "Replace the affected PBE", this AD requires replacing that text with "Except as required by paragraph (4) of EASA AD 2025-0297, replace the affected PBE". (4) This AD does not adopt the "Remarks" section of EASA AD 2025-0297. (i) Additional AD Provisions The following provisions also apply to this AD: Alternative Methods of Compliance (AMOCs): The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: [email protected] . Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (j) Additional Information For more information about this AD, contact Harjot Rana, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7344; email: [email protected]. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2025-0297, dated December 23, 2025. (ii) Safran Aerosystems Service Bulletin 1540F-35-002, Revision 01, dated January 5, 2026, including the Appendix A digital attachment, modified January 5, 2026, 8:51 p.m. UTC+01:00. (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email [email protected]. You may find this material on the EASA website at ad.easa.europa.eu. (4) For Safran Aerosystems material identified in this AD, contact Safran Aerosystems, Customer Support & Services, Technical Publication Department, 61 Rue Pierre Curie, CS20001, 78373 Plaisir Cedex, France; phone: + 33 (0)1 61 34 23 23; email: [email protected]; website: www.safran-aerosystems.com. (5) You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (6) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email [email protected]. Issued on February 23, 2026. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2026-03799 Filed 2-23-26; 4:15 pm]BILLING CODE 4910-13-P