{"data":{"id":"us/14-cfr-21.113","jurisdiction":"us","citation":"14 CFR 21.113","heading":"Requirement for supplemental type certificate.","body":"(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.\n(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.\n(c) The application for an STC must be made in the form and manner prescribed by the FAA.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—AIRCRAFT","PART 21—CERTIFICATION PROCEDURES FOR PRODUCTS AND ARTICLES","Subpart E—Supplemental Type Certificates"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"0a101a78a2ffa74d389fd6c5dd27ecf7a1d73682219f732c7be5a59fe98bc379","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-21.111","next":"us/14-cfr-21.115"},"notice":"GroundRules: Original legal text. Not legal advice."}