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§ 21.117
Issue of supplemental type certificates.
(a) An applicant is entitled to a supplemental type certificate if the FAA finds that the applicant meets the requirements of §§ 21.113 and 21.115.
(b) A supplemental type certificate consists of—
(1) The approval by the FAA of a change in the type design of the product; and
(2) The type certificate previously issued for the product.
[Doc. No. 5085, 29 FR 14568, Oct. 24, 1964, as amended by Amdt. 21-92, 74 FR 53387, Oct. 16, 2009]