14 CFR 39.27
§ 39.27 What do I do if the airworthiness directive conflicts with the service document on which it is based?
United States · 14 CFR — Aeronautics and Space · Status: effective
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- Citation
- 14 CFR 39.27, § 39.27 What do I do if the airworthiness directive conflicts with the service document on which it is based?, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/55262
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Full text
In some cases an airworthiness directive incorporates by reference a manufacturer's service document. In these cases, the service document becomes part of the airworthiness directive. In some cases the directions in the service document may be modified by the airworthiness directive. If there is a conflict between the service document and the airworthiness directive, you must follow the requirements of the airworthiness directive.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.