Complex sentence: Flight training was provided by the Darr School of Aeronautics, Fairchild PT-19s were the primary trainer at the airfield; there were also several PT-17 Stearmans and a few P-40 Warhawks assigned.
Split into simpler sentences: Flight training was provided by the Darr School of Aeronautics, Fairchild PT-19s were the primary trainer at the airfield. Also had several PT-17 Stearmans and a few P-40 Warhawks assigned.