Data / Federal rules / 2026-19173
Establishment of United States Area Navigation Route T-581 in the Vicinity of Missoula, Montana
The Federal Aviation Administration published this final rule in the Federal Register on September 18, 2026. It takes effect on October 29, 2026.
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What the agency says
This action corrects a final rule published by the FAA in the Federal Register on August 3, 2026, establishing United States Area Navigation (RNAV) Route T-581 in the vicinity of Missoula, Montana. Specifically, this action corrects the description of the route in the regulatory text of the final rule.
Key facts
- Document number
- 2026-19173
- Type
- Final rule
- Action
- Final rule; correction
- Agency
- Transportation Department; Federal Aviation Administration
- Published
- September 18, 2026
- Takes effect
- October 29, 2026
- Dates
- The effective date of the final rule published in the Federal Register on August 3, 2026, remains 0901 UTC, October 29, 2026. The Director of the Federal Register approves this incorporation by reference action under 14 CFR part 71, subject to the annual revision of FAA Order JO 7400.11 and publication of conforming amendments.
- Docket
- Docket No. FAA-2025-3288; Airspace Docket No. 25-ANM-158
- Regulation ID (RIN)
- 2120-AA66
- Code of Federal Regulations
- 14 CFR 71
- Pages
- 2
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Everything from the Federal Aviation Administration · Published in September 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.