An F-15D (front) is parked in a training hangar at

An F-15D (front) is parked in a training hangar at Sheppard Air Force Base, Texas, July 23, to be used for training F-15 aircraft maintenance students on the latest equipment and controls of an F-15 jet. Sheppard acquired a total of 13 F-15s which were converted into trainers to update F-15 maintenance courses that used F-15A and F-15B models, which do not match the models currently used on operational flightlines. The newer-model aircraft is awaiting the arrival of technical orders before it can be used to instruct students.