As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKEOFF REJECTED AT 120 KNOTS AT RKSI, DUE TO NR 1 INS FAIL WARNING AND CAPTAIN'S ATTITUDE INSTRUMENT FAIL WARNING. REMOVED AND REPLACED NR 1 INU IN ACCORDANCE WITH AMM 34-41-03. OPERATIONAL CHECK NORMAL ON GROUND. ACCOMPLISHED HIGH ENERGY STOP/HEAT DAMAGE CONDITION INSPECTION IN ACCORDANCE WITH AMM 05-51-10. NO DISCREPANCIES FOUND.