The XNQ-1 basic/advanced trainer was developed for the U.S. Navy and was first flown by Richard Henson on 7 October 1946. Two prototypes were flown as
XNQ-1 (BuNo. 75725 & 75726). Delivered to the U.S. Navy in 1947 for trials, they were rejected due to problems with exhaust fumes leaking into the cockpit. The first prototype was subsequently to receive a number of engine changes, first powered with a 320 hp
Lycoming R-680-13, then finally with a horizontally opposed 350 hp
Lycoming GSO-580. The aircraft was destroyed in a crash in 1950. The second aircraft (BuNo. 75726), with a larger stabilizer, was evaluated by the United States Air Force in 1949 as a replacement for the
AT-6, with the USAF selecting it on 24 March 1949 as a primary trainer. Designed to be
aerobatic to teach pilots maneuvers, such as stalls, spins and rolls, Fairchild received a contract for 100
Model 129s under the USAF designation
T-31. However, the order was cancelled later in 1949, in favor of the
Beech T-34 Mentor. Fairchild dropped plans to develop the design as the company concentrated on other production contracts, including the
C-119 Flying Boxcar. ==Surviving aircraft==