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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 14
Chapter I
Part 21
Subpart D - Subpart D—Changes to Type Certificates
§ 21.91 - Applicability.
§ 21.93 - Classification of changes in type design.
§ 21.95 - Approval of minor changes in type design.
§ 21.97 - Approval of major changes in type design.
§ 21.99 - Required design changes.
§ 21.101 - Designation of applicable regulations.
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