---
kind: "unit"
title: "14"
title_heading: "Aeronautics and Space"
key: "chI/subchE/part77"
level: "part"
label: "Part 77"
heading: "Safe, Efficient Use, and Preservation of the Navigable Airspace"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/14/chI-subchE-part77"
sections_count: 21
---

# Part 77 — Safe, Efficient Use, and Preservation of the Navigable Airspace

Title 14 C.F.R. — Aeronautics and Space › Chapter I — Federal Aviation Administration, Department of Transportation › Subchapter E — Airspace

## Contents

- [Subpart A — General](/cfr/14/chI-subchE-part77-subpartA.md)
- [Subpart B — Notice Requirements](/cfr/14/chI-subchE-part77-subpartB.md)
- [Subpart C — Standards for Determining Obstructions to Air Navigation or Navigational Aids or Facilities](/cfr/14/chI-subchE-part77-subpartC.md)
- [Subpart D — Aeronautical Studies and Determinations](/cfr/14/chI-subchE-part77-subpartD.md)
- [Subpart E — Petitions for Discretionary Review](/cfr/14/chI-subchE-part77-subpartE.md)