 Production was delayed, however, as the first Royal Canadian Air Force (RCAF) model was not flying until 18 April 1941.The availability of the Fairchild Cornell, and a change in what constituted an "advanced" trainer, led to the contract's being sharply cut back, and only 101 Forts were ultimately delivered to the RCAF between June 1941 and June 1942.Initially, the RCAF did not want to order the Model 60K, and their concerns proved valid.