In January 1993, Kelly was selected to attend the U.S. Naval Test Pilot School at Naval Air Station Patuxent River, Maryland. His classmates included his brother, Mark and other future astronauts Alvin Drew, Lisa Nowak, and Stephen Frick. He graduated in June 1994 and was assigned to the Strike Aircraft Test Directorate at Patuxent River. One of his initial assignments was to investigate the F-14 crash that killed Kara Hultgreen. His assessment was to create a digital flight control system that would have saved Hultgreen's life. This resulted in the acceleration of one's development, and he was the first pilot to fly the F-14 with the digital flight control system installed.