sentences:  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.