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.