Data / Federal rules / 2026-21331
Airworthiness Directives; Airbus SAS Airplanes
The Federal Aviation Administration published this final rule in the Federal Register on October 19, 2026. It takes effect on November 23, 2026.
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What the agency says
The FAA is superseding Airworthiness Directive (AD) 2025-04- 05, which applied to all Airbus SAS Model A330-841 and -941 airplanes. AD 2025-04-05 required a revision of the existing airplane flight manual (AFM) and removal of the previously required limitations; a revision of the existing minimum equipment list (MEL); one-time or repetitive seal integrity tests of each engine bleed air system (EBAS) high pressure valve (HPV); additional maintenance instructions and corrective actions; and repetitive replacement of affected HPV clips; as applicable. AD 2025-04-05 also limited the installation of affected HPV clips. Since the FAA issued AD 2025-04-05, an improved EBAS HPV with unaffected HPV clips was certified, and it was determined that the bleed monitoring computer (BMC) software (SW) must be updated. This AD continues to require the actions in AD 2025-04-05, except for repetitive replacement of affected HPV clips. This AD also requires updating the BMC SW, additional work, and an additional revision of the existing MEL for the engine bleed overpressure valve; as applicable. This AD also prohibits the installation of certain BMC software. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-21331
- Type
- Final rule
- Action
- Final rule
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- October 19, 2026
- Takes effect
- November 23, 2026
- Dates
- This AD is effective November 23, 2026.
- Docket
- Docket No. FAA-2026-4649; Project Identifier MCAI-2025-00835-T; Amendment 39-23488; AD 2026-20-15
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 5
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in October 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.