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CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER C—AIRCRAFT (parts 21 to 50) > PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS > SUBPART B—Type Certificates (§21.11 to §21.55) > 21.51—Duration.
21.51—Duration.
A type certificate is effective until surrendered, suspended, revoked, or a termination date is otherwise established by the Administrator.