U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 39 - PART 39—AIRWORTHINESS DIRECTIVES
§ 39.1 - Purpose of this regulation.
§ 39.3 - Definition of airworthiness directives.
§ 39.5 - When does FAA issue airworthiness directives?
§ 39.7 - What is the legal effect of failing to comply with an airworthiness directive?
§ 39.9 - What if I operate an aircraft or use a product that does not meet the requirements of an airworthiness directive?
§ 39.11 - What actions do airworthiness directives require?
§ 39.13 - Are airworthiness directives part of the Code of Federal Regulations?
§ 39.15 - Does an airworthiness directive apply if the product has been changed?
§ 39.17 - What must I do if a change in a product affects my ability to accomplish the actions required in an airworthiness directive?
§ 39.19 - May I address the unsafe condition in a way other than that set out in the airworthiness directive?
§ 39.21 - Where can I get information about FAA-approved alternative methods of compliance?
§ 39.23 - May I fly my aircraft to a repair facility to do the work required by an airworthiness directive?
§ 39.25 - How do I get a special flight permit?
§ 39.27 - What do I do if the airworthiness directive conflicts with the service document on which it is based?
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