# 2026-16333: FAA Tweaks Sky Boxes Over Tri-Cities Airport

2026-16333, Amendment of Class D Airspace and Class E Airspace Over Tri-Cities, TN, is a Federal Register proposed rule from Transportation Department, Federal Aviation Administration published 2026-08-11, effective Comments must be received on or before September 25, 2026.; PRIA reads it as touching household money (as of 2026-08-18).

- Canonical: https://policyrisk.com/federal-register/2026-16333
- As of: 2026-08-18
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-16333
- Title: Amendment of Class D Airspace and Class E Airspace Over Tri-Cities, TN
- Type: Proposed Rule
- Agencies: Transportation Department; Federal Aviation Administration
- Citation: 91 FR 51604
- Published: 2026-08-11
- Effective: Comments must be received on or before September 25, 2026.
- Comments close: 2026-09-25
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 2120-AA66
- Last updated: 2026-08-18

## In one line

FAA Tweaks Sky Boxes Over Tri-Cities Airport

## Summary

This action proposes to amend Class D and Class E airspace over Tri-Cities, TN. This action would modify the dimensions of the Tri-Cities, TN Class D and Class E2 airspace to appropriately contain Instrument Flight Rules (IFR) operations at the Tri-Cities Airport. This action would also remove the Tri-Cities, TN Class E4 airspace, as it is no longer necessary. This action would also modify the Tri- Cities, TN Class E5 airspace to appropriately contain IFR operations at the airport. This action would also update verbiage in the Class D and Class E2 airspace legal descriptions to comply with current FAA guidance. This action would also update the airport name for Tri-Cities Airport in the Class D, Class E2, and Class E5 airspace legal descriptions.

## Effects PRIA read

- Class D and E2 Area Expanded to 4.7 Miles: benefit, low. The FAA proposes to expand the Tri-Cities, TN Class D and Class E2 airspace so it extends to within a 4.7-mile radius of Tri-Cities Airport and within 1 mile each side of the 042° bearing from the airport, extending from the 4.7-mile radius to 5.3 miles northeast of the airport. The change is meant…
- Class E5 Area Increased for IFR Containment: benefit, low. The FAA proposes to expand the Tri-Cities, TN Class E5 airspace to within a 9.3-mile radius of Tri-Cities Airport, and to specific corridor extensions: 4 miles west and 8 miles east of the 223° bearing extending from the 9.3-mile radius to 23 miles southwest; 2.1 miles each side of the 270° bearing…
- Class E4 Airspace Designation Removed: benefit, low. The FAA proposes to remove the Tri-Cities, TN Class E4 airspace designation because it will no longer be necessary to contain IFR operations after the Class D airspace is modified. The removal is a direct change stated in the proposal.
- Operators May Incur De Minimis Rerouting Costs: cost, low. The FAA states the proposed amendments are routine and are expected to result in, at most, de minimis costs from compliance or minor flight rerouting for operators who choose to navigate around the controlled airspace. The FAA also certifies the proposal will not have a significant economic impact…

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## Sources
- [2026-16333 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/11/2026-16333/amendment-of-class-d-airspace-and-class-e-airspace-over-tri-cities-tn)
- [2026-16333 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-11/pdf/2026-16333.pdf)

## Related
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- [Next: 2026-16335, Air Quality Plan; Arizona; Maricopa County Air Quality Department; Gasoline Loa…](https://policyrisk.com/federal-register/2026-16335)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-16333 (as of 2026-08-18).