Data / Federal rules / 2026-01180
Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
The Federal Aviation Administration published this final rule in the Federal Register on January 22, 2026. It took effect on February 26, 2026.
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What the agency says
The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, EC635T2+, and EC135T3 helicopters. This AD was prompted by reports of ruptured and deformed flexible couplings. This AD requires inspecting the axial displacement of the tail rotor drive shaft and, depending on the results, taking corrective actions including inspecting the flexible couplings. This AD also prohibits installing a tail rotor drive shaft unless certain procedures are followed. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-01180
- Type
- Final rule
- Action
- Final rule
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- January 22, 2026
- Takes effect
- February 26, 2026
- Dates
- This AD is effective February 26, 2026.
- Docket
- Docket No. FAA-2025-0629; Project Identifier MCAI-2023-01183-R; Amendment 39-23237; AD 2026-02-01
- 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 January 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.