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Establishment of United States Area Navigation Route T-581 in the Vicinity of Missoula, Montana

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 o...

PDF versionFederalRegister.gov
Department of Transportation
Federal Aviation Administration
  1. 14 CFR Part 71
  2. [Docket No. FAA-2025-3288; Airspace Docket No. 25-ANM-158]
  3. RIN 2120-AA66

AGENCY:

Federal Aviation Administration (FAA), DOT.

ACTION:

Final rule; correction.

SUMMARY:

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.

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.

ADDRESSES:

FAA Order JO 7400.11M, Airspace Designations and Reporting Points, and subsequent amendments can be viewed online at www.faa.gov/​air_​traffic/​publications/​. You may also contact the Rules and Regulations Group, Office of Policy, Federal Aviation Administration, 800 Independence Avenue SW, Washington DC 20591; telephone: (202) 267-8783.

FOR FURTHER INFORMATION CONTACT:

Steven Roff, Rules and Regulations Group, Office of Policy, Federal Aviation Administration, 800 Independence Avenue SW, Washington, DC 20591; telephone: (202) 267-8783.

SUPPLEMENTARY INFORMATION: ( printed page 59056)

History

The FAA published a final rule in the Federal Register for Docket No. FAA-2025-3288 (91 FR 48756; August 3, 2026), establishing RNAV Route T-581. The legal description in that final rule for T-581 contains two route points that should not be listed in the description due to them being a turn of less than one degree. This action corrects these errors.

Correction to the Final Rule

Accordingly, pursuant to the authority delegated to me, the final rule for Docket No. FAA-2025-3288, as published in the Federal Register on August 3, 2026 (91 FR 48756; FR Doc. 2026-15675), is corrected as follows:

On page 48757, in the third column, under the heading “Paragraph 6011 United States Area Navigation Routes,” revise the table across all three columns to read as follows:

T-581 Missoula, MT (MSO) TO Kalispell, MT (FCA) [NEW]
Missoula, MT (MSO) VOR/DME (Lat. 46°54′28.68″ N, long. 114°05′01.15″ W)
Kalispell, MT (FCA) VOR/DME (Lat. 48°12′50.77″ N, long. 114°10′33.21″ W)

Issued in Washington, DC, on September 16, 2026.

Alex W. Nelson,

Manager, Rules and Regulations Group.

[FR Doc. 2026-19173 Filed 9-17-26; 8:45 am]

BILLING CODE 4910-13-P

Legal Citation

Federal Register Citation

Use this for formal legal and research references to the published document.

91 FR 59055

Web Citation

Suggested Web Citation

Use this when citing the archival web version of the document.

“Establishment of United States Area Navigation Route T-581 in the Vicinity of Missoula, Montana,” thefederalregister.org (September 18, 2026), https://thefederalregister.org/documents/2026-19173/establishment-of-united-states-area-navigation-route-t-581-in-the-vicinity-of-missoula-montana.