Code Aircraft Unit Name Base Command RA C-21A, T-37B, T-38A, AT-38B 12th Flying Training Wing AFB Randolph, Universal City, TX T-1A, T-43A T-1A 99th Flying Training Squadron Panthers T-1A 100th Flying Training Squadron AT-38B 435th Flying Training Squadron Black Eagles T-37B, T-6A 559th Flying Training Squadron Billygoats ..