At Langley AFB, the 136th trained with their F-51D Mustangs. Unfortunately losing two 111th FBS pilots in a training accident on 15 December. A third pilot was killed on 27 January 1951 in another accident. In February 1951, the aged F-51Ds that the unit had been flying since its activation in 1947 were replaced by F-84E Thunderjets, and the squadron began transition training on the jet fighter-bomber. Most of the training took place at Langley, although some pilots were sent to Shaw AFB, South Carolina. Maintenance crews, all new to jet aircraft, were trained at Langley and engine specialists were sent to the Allison plant in Indianapolis. Assigned to the Arkansas ANG 154th FBS at the time was a Navy exchange pilot, future NASA astronaut Lt. Walter Schirra (who happened to be the only pilot assigned to the 136th at the time who was a qualified jet pilot).