# Airworthiness Directives; Aerospace & Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide)
> **Rule** · Final rule; request for comments. · Published 2025-12-30 · Effective 2026-01-14 · 90 FR 61050
## Document
- **Document number:** 2025-24014
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 90 FR 61050
- **Publication date:** 2025-12-30
- **Effective date:** 2026-01-14
- **FAA docket:** Docket No. FAA-2025-5400
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2025-25- 02, which applied to all aircraft equipped with certain Aerospace & Defense Oxygen Systems SaS portable breathing equipment (PBE). AD 2025- 25-02 required incorporating revised procedures for donning the PBE. Since the FAA issued AD 2025-25-02, the agency determined the unsafe condition may be addressed by incorporating the updated procedures into documentation that is not identified in AD 2025-25-02 and that certain requirements in AD 2025-25-02 must be revised. This AD requires incorporating updated procedures for donning the PBE. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/12/30/2025-24014/airworthiness-directives-aerospace-and-defense-oxygen-systems-sas-part-of-safran-aerosystems)
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