View all text of Subpart E [§ 21.111 - § 21.120]
§ 21.113 - Requirement for supplemental type certificate.
(a) If a person holds the TC for a product and alters that product by introducing a major change in type design that does not require an application for a new TC under § 21.19, that person must apply to the FAA either for an STC, or to amend the original type certificate under subpart D of this part.
(b) If a person does not hold the TC for a product and alters that product by introducing a major change in type design that does not require an application for a new TC under § 21.19, that person must apply to the FAA for an STC.
(c) The application for an STC must be made in the form and manner prescribed by the FAA.