U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 21Subpart D - Subpart D—Changes to Type Certificates
View all text of Subpart D [§ 21.91 - § 21.101]
§ 21.91 - Applicability.

This subpart prescribes procedural requirements for the approval of changes to type certificates.

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