U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

§ 21.620 - Changes in quality system.

After the issuance of a TSO authorization—

(a) Each change to the quality system is subject to review by the FAA; and

(b) The holder of the TSO authorization must immediately notify the FAA, in writing, of any change that may affect the inspection, conformity, or airworthiness of its article.