AD 2026-03799

[Federal Register Volume 91, Number 37 (Wednesday, February 25, 2026)] [Rules and Regulations] [Pages 9137-9140] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2026-03799]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2026-0744; Project Identifier MCAI-2026-00001-Q; Amendment 39-23258; AD 2026-03-09] RIN 2120-AA64

Airworthiness Directives; Aerospace & Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide) Portable Breathing Equipment (PBE)

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Aerospace & Defense Oxygen Systems SaS portable breathing equipment (PBE). This AD was prompted by reports of occurrences of PBE not delivering oxygen once donned. This AD requires replacing affected PBE and prohibits the installation of affected PBE. The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective March 12, 2026. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of March 12, 2026. The FAA must receive comments on this AD by April 13, 2026.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 11.43 and 11.45, by any of the following methods: Federal eRulemaking Portal: Go to regulations.gov. Follow the instructions for submitting comments. Fax: 202-493-2251. Mail: U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590. Hand Delivery: Deliver to Mail address above between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2026-0744; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this final rule, the mandatory continuing airworthiness information (MCAI), any comments received, and other information. The street address for Docket Operations is listed above. Material Incorporated by Reference: For European Union Aviation Safety Agency (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. 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. 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. It is also available at regulations.gov under Docket No. FAA-2026-0744.

FOR FURTHER INFORMATION CONTACT: Harjot Rana, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516- 228-7344; email: [email protected].