Is there an FAA definition of what the specific criteria are for an aircraft to be considered new?
ANSWER: The only place I can find this addressed is in FAA Order 8130.2F which states in part:
"An aircraft may be considered new as long as ownership is retained by the manufacturer, distributor, or dealer; if there is no intervening private owner, lease, or time-sharing arrangements; and if the aircraft has not been used in any pilot school and/or air taxi operation. An aircraft is still considered new regardless of the operating time logged by the manufacturer, distributor, or dealer"