Airworthiness Directive 2026-03799
one-timeAirworthiness Directives; Aerospace & Defense Oxygen Systems SaS (Part of Safran Aerosystems) (Formerly Known as Air Liquide) Portable Breathing Equipment (PBE)
What this AD requires
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.
Which aircraft AD 2026-03799 applies to
Applies only to portable breathing equipment manufactured between March 2015 and March 2017 (inclusive) bearing 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.
Whether AD 2026-03799 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.