---
kind: "unit"
title: "14"
title_heading: "Aeronautics and Space"
key: "chI/subchC/part39"
level: "part"
label: "Part 39"
heading: "Airworthiness Directives"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/14/chI-subchC-part39"
sections_count: 14
---

# Part 39 — Airworthiness Directives

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

## Sections

- [§39.1. Purpose of this regulation.](/cfr/14/39.1.md)
- [§39.3. Definition of airworthiness directives.](/cfr/14/39.3.md)
- [§39.5. When does FAA issue airworthiness directives?](/cfr/14/39.5.md)
- [§39.7. What is the legal effect of failing to comply with an airworthiness directive?](/cfr/14/39.7.md)
- [§39.9. What if I operate an aircraft or use a product that does not meet the requirements of an airworthiness directive?](/cfr/14/39.9.md)
- [§39.11. What actions do airworthiness directives require?](/cfr/14/39.11.md)
- [§39.13. Are airworthiness directives part of the Code of Federal Regulations?](/cfr/14/39.13.md)
- [§39.15. Does an airworthiness directive apply if the product has been changed?](/cfr/14/39.15.md)
- [§39.17. What must I do if a change in a product affects my ability to accomplish the actions required in an airworthiness directive?](/cfr/14/39.17.md)
- [§39.19. May I address the unsafe condition in a way other than that set out in the airworthiness directive?](/cfr/14/39.19.md)
- [§39.21. Where can I get information about FAA-approved alternative methods of compliance?](/cfr/14/39.21.md)
- [§39.23. May I fly my aircraft to a repair facility to do the work required by an airworthiness directive?](/cfr/14/39.23.md)
- [§39.25. How do I get a special flight permit?](/cfr/14/39.25.md)
- [§39.27. What do I do if the airworthiness directive conflicts with the service document on which it is based?](/cfr/14/39.27.md)