C.R.S. § 39-26-711
39-26-711. Aircraft - tangible personal property
39-26-711. Aircraft - tangible personal property. (1) The following shall be exempt from taxation under the provisions of part 1 of this article:
(a) Effective July 1, 1984, the sale of aircraft used or purchased for use in interstate commerce by a commercial airline; and
(b) The sale of tangible personal property that is to be permanently affixed or attached as a component part of an aircraft.
(2) The following shall be exempt from taxation under the provisions of part 2 of this article:
(a) Effective July 1, 1984, the storage, use, or consumption of aircraft used or purchased for use in interstate commerce by a commercial airline; and
(b) The storage, use, or consumption of any tangible personal property that is to be permanently affixed or attached as a component part of an aircraft.