Data / Federal rules / 2026-16507
Airworthiness Directives; Airbus Helicopters
The Federal Aviation Administration published this final rule in the Federal Register on August 13, 2026. It took effect on September 17, 2026.
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What the agency says
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Model AS350B2 helicopters. This AD was prompted by a report of magnetization on the solenoid valves for the three main servo-controls, the regulator block, and the tail servo- control due to a diode not properly installed in the hydraulic circuit. This AD requires performing a cut-off test of the rear rotor actuator valve and, depending on the results of the test, performing corrective actions. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-16507
- Type
- Final rule
- Action
- Final rule
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- August 13, 2026
- Takes effect
- September 17, 2026
- Dates
- This AD is effective September 17, 2026.
- Docket
- Docket No. FAA-2026-4646; Project Identifier MCAI-2025-01763-R; Amendment 39-23435; AD 2026-16-05
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 3
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Everything from the Federal Aviation Administration · Rules on air transportation · Rules on aircraft · Rules on aviation safety · Published in August 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.