What was found
AFT V1 NR 1 ENGINE EGT WENT TO 910 DEG, N1 FELL TO 82 PERCENT, N2 FELL TO 85 PERCENT, FUEL FLOW INCREASED TO ABOUT 15,000LBS PER HR. NO LIMITS OR RED LINES WERE APPROACH EWD. LEVELED OFF AT 18,000FT, EGT AND FUEL FLOW CONTINUED TO INCREASE. EVENTUALLY PULLED THROTTLE TO IDLE TO KEEP EGT BELOW 880 DEG C. AFTER LANDING DISCOVERED ENGINE IS SEIZED. REMOVED AND REPLACED NR 1 ENG I/A/W MEO149, IDLE AND LEAK CHECK NORMAL.