What was found
FLT 4370 CREW REPORTED AFTER TAKEOFF ENGINE 1 STARTED TO SURGE. SMELLED AN ELECTRICAL ODOR. MOVED THRUST LVL 1 TO IDLE - NO SURGING OR ODOR. DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. SHUT ENGINE 1 DOWN AFTER LANDING NO SMOKE COMING FROM ENG 1 HAD LOSS OF ENG 1 ITT THROUGHOUT INCIDENT. INITIAL T/S REVEALED AN ITT SPLIT OF ABOUT 100 DEGREES. (NR 1 ENGINE APPROX 550 NR 2 ENGINE 450) SUSPECTED POSSIBLE INTERNAL BLEED LEAK. REMOVED AND REPLACED ENGINE NR 1 IAW W/C 71-000-00. THE OPERATIONAL LEAK CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.