On December 18, 1941, Johnson reported to the Missouri Institute of Aeronautics, a civilian contractor school in Sikeston, Missouri, for Primary Flying Training. His first five hours of the pre-solo training phase were flown in a PT-19A, in which he was instructed in spin recoveries, stalls, and basic turning maneuvers. He then began nearly sixty hours of Primary training in the more agile PT-18 Kaydet, practicing aerobatic maneuvers. All of the training, which included more than 175 landings, was conducted in open-cockpit trainers in the dead of winter.