2026-15-01: 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: 2026-15-01 Airbus SAS: Amendment 39-23413; Docket No. FAA-2026-3873; Project Identifier MCAI-2025-00197-T. (a) Effective Date This airworthiness directive (AD) is effective September 3, 2026. (b) Affected ADs None. (c) Applicability This AD applies to Airbus SAS airplanes identified in paragraphs (c)(1) and (2) of this AD, certificated in any category, modified in accordance with FAA Supplemental Type Certificate (STC) ST04038NY. (1) Model A330-201, -202, -203, -223, and -243 airplanes. (2) Model A330-301, -302, -303, -321, -322, -323, -341, -342, and -343 airplanes. (d) Subject Air Transport Association (ATA) of America Code 35, Oxygen. (e) Unsafe Condition This AD was prompted by a finding that, for airplanes with a flightcrew oxygen system supplied by a single oxygen cylinder, the oxygen supply would not be sufficient under all circumstances for extended operations (ETOPS) with a maximum diversion time of 180 minutes (ETOPS-180) with four flightcrew members. The FAA is issuing this AD to limit ETOPS-180 operations to three flightcrew members on airplanes with a flightcrew oxygen system supplied by a single oxygen cylinder and to address incorrect minimum oxygen dispatch pressure information in the airplane flight manual supplement (AFM-S). The unsafe condition, if not addressed, could result in insufficient oxygen supply in emergency situations during ETOPS-180 operation with four flightcrew members. (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 2025-0047, dated February 20, 2025 (EASA AD 2025-0047). (h) Exceptions to EASA AD 2025-0047 (1) Where EASA AD 2025-0047 refers to its effective date, this AD requires using the effective date of this AD. (2) Where EASA AD 2025-0047 defines the AFM-S update as, "Aeroplane Flight Manual Supplement (AFM-S) Limitations update, as defined in Appendix 1 of this AD; and Elbe Flugzeugwerke GmbH (EFW) A330 P2F Flight Crew Operating Manual Supplement (FCOM-S) ENV-Temporary Revision No. 00-007 (Based on the Apr 01/23)", this AD requires replacing that text with "Airplane Flight Manual Supplement (AFM-S) Limitations update, as defined in Appendix 1 of this AD". (3) Where paragraph (1) of EASA AD 2025-0047 says to "implement the AFM-S update", this AD requires replacing that text with "revise the "Appendices and Supplements" section of the existing AFM Supplement to incorporate the applicable limitations in the AFM-S update". (4) Where paragraph (1) of EASA AD 2025-0047 specifies to "inform all flight crews, and, thereafter, operate the aeroplane accordingly," this AD does not require those actions as those actions are already required by existing FAA operating regulations (see 14 CFR 91.9, 91.505, and 121.137). (5) This AD does not adopt the "Remarks" section of EASA AD 2025-0047. (i) Additional AD Provisions The following provisions also apply to this AD: (1) 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 Internal Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: AMOC@faa.gov . Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or EASA; or Airbus SAS's EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature. (j) Additional Information For more information about this AD, contact Joseph Catanzaro, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Westbury, NY 11590; phone: 516-228-7366; email: Joseph.Catanzaro@faa.gov. (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 2025-0047, dated February 20, 2025. (ii) [Reserved] (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49 221 8999 000; email ADs@easa.europa.eu. You may find this material on the EASA website at ad.easa.europa.eu. (4) 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. (5) 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 fr.inspection@nara.gov. Issued on July 28, 2026. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2026-15455 Filed 7-29-26; 8:45 am]BILLING CODE 4910-13-P