Data / Federal rules / 2026-20100
Airworthiness Directives; Leonardo S.p.a. Helicopters
The Federal Aviation Administration published this final rule in the Federal Register on October 1, 2026. It took effect on October 16, 2026. Comments are due by November 16, 2026.
SpecStream is the live web data engine for teams and agents. It reads every rule and proposed rule in the Federal Register each morning, and this page is that reading. Name your industry once and new rules, comment deadlines and effective dates arrive in your sheet, CRM, Slack or agent as they are published.
What the agency says
The FAA is adopting a new airworthiness directive (AD) for certain Leonardo S.p.a. Model AB139 and AW139 helicopters. This AD was prompted by a report of a nozzle exhaust duct clamp separating from the engine nozzle duct and coming to rest on the tail rotor (TR) drive shaft. This AD requires repetitively inspecting certain clamp assemblies and, depending on the results of the inspection, replacing parts. This AD also prohibits the installation of an affected clamp assembly, unless certain requirements are met. The FAA is issuing this AD to address the unsafe condition on these products.
Key facts
- Document number
- 2026-20100
- Type
- Final rule
- Action
- Final rule; request for comments
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- October 1, 2026
- Takes effect
- October 16, 2026
- Comments due
- November 16, 2026
- Dates
- This AD is effective October 16, 2026.
- Docket
- Docket No. FAA-2026-11789; Project Identifier MCAI-2026-00908-R; Amendment 39-23480; AD 2026-20-07
- Regulation ID (RIN)
- 2120-AA64
- Code of Federal Regulations
- 14 CFR 39
- Topics
- Air transportation; Aircraft; Aviation safety; Incorporation by reference; Safety
- Pages
- 4
Other documents from the Federal Aviation Administration
| Document | Type | Published |
|---|---|---|
| Airworthiness Directives; The Boeing Company Airplanes; Correction 2026-21686 | Final rule | Oct 23 |
| Airworthiness Directives; MD Helicopters, LLC Helicopters 2026-21664 | Final rule | Oct 23 |
| Airworthiness Directives; General Electric Company Engines 2026-21590 | Final rule | Oct 22 |
| Establishment of Class E Airspace; Havana, IL 2026-21565 | Final rule | Oct 22 |
| Revocation of Class E Airspace; Santa Elena, TX 2026-21564 | Final rule | Oct 22 |
| Establishment of Class E Airspace; DeKalb, IL 2026-21563 | Final rule | Oct 22 |
| Airspace Designations; Incorporation by Reference Amendment of FAA Order JO 7400.11M 2026-21422 | Final rule | Oct 20 |
| Airworthiness Directives; Airbus Helicopters 2026-21387 | Proposed rule | Oct 19 |
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.