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 E—Supplemental Type Certificates (§21.111 to §21.120) > 21.120—Responsibility of supplemental type certificate holders to provide written permission for alterations.

21.120—Responsibility of supplemental type certificate holders to provide written permission for alterations.

A supplemental type certificate holder who allows a person to use the supplemental type certificate to alter an aircraft, aircraft engine, or propeller must provide that person with written permission acceptable to the FAA.

Code of Federal Regulations

[Doc. No. FAA-2003-14825, 71 FR 52258, Sept. 1, 2006]