Airworthiness Directive · Amendment 39-23258 · Oxygen
Aerospace & Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide) Portable Breathing Equipment (PBE)
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.
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.
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).
(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.
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: 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.
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: 9-AVS-AIR-BACO-COS@faa.gov.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
Appliances and equipment
