What was found
DURING TAKEOFF AT APPROXIMATELY 60 TO 70 KTS, THE FIRST OFFICERS ADI ROLLED 90 DEGREES LEFT, CIWS ATT LIGHT ON AND THE GYRO FLAG WAS IN VIEW. AFTER THE ABORT THE ADI RETURNED TO NORMAL GYRO FLAG DISAPPEARED AND THE CIWS ATT LIGHT WENT OUT. NR 2 INS WAS CHECKED FOR ERROR CODES AND NONE WERE DISPLAYED. REPLACED FIRST OFFICER'S ADI OPERATIONAL CHECKED SATISFACTORY PER 34-27-00.