# Amendment of United States Area Navigation (RNAV) Route T-437; Eastern United States
> **Rule** · Final rule. · Published 2026-10-13 · Effective 2026-12-24 · 91 FR 64756
## Document
- **Document number:** 2026-20847
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 91 FR 64756
- **Publication date:** 2026-10-13
- **Effective date:** 2026-12-24
- **FAA docket:** Docket No. FAA-2026-1062
## Abstract

This action amends United States Area Navigation (RNAV) Route T-437 in the eastern United States. This action supports FAA Next Generation Air Transportation System (NextGen) efforts to provide a modern RNAV route structure to improve the safety and efficiency of the National Airspace System (NAS).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/10/13/2026-20847/amendment-of-united-states-area-navigation-rnav-route-t-437-eastern-united-states)
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