What was found
ON TAKEOFF CLIMBOUT OF OAKN ENGINE NR 1 EXHAUST GAS TEMPERATURE REACHED 999 DEG CELSIUS FOR MORE THAN 90 SECONDS, CREW OPTED TO SHUTDOWN ENGINE NR 1 IN FLIGHT IN ACCORDANCE WITH QUICK REFERENCE HANDBOOK. CONTINUED FLIGHT TO OMSJ AND LANDED SAFELY. AFTER LANDING MAINTENANCE CREW IN OMSJ PERFORMED A BORESCOPE INSPECTION ON ENGINE NR 1 AND FOUND SOME BLADES ON THE HIGH PRESSURE TURBINE ROTOR NICKED BEYOND ALLOWABLE LIMITS. REMOVED AND REPLACED ENGINE NR 1 AND PERFORMED ENGINE REPLACEMENT RUN UP TEST IN ACCORDANCE WITH AMM 71-00-00. ALL OPERATIONS AND ENGINE PARAMETERS NORMAL. AIRCRAFT RESTORED TO NORMAL.