What was found
BWI - FL2700 - FLIGHT RETURNED TO FIELD AT BWI AND LANDED WITHOUT INCIDENT DUE TO THE NR 2 ENGINE FUEL HEAT VALVE OPEN LIGHT FLICKERING AND THE NR 2 ENGINE OIL TEMPERATURE RISING SLIGHTLY HIGHER THAN THE NR 1 ENGINE INTO THE YELLOW RANGE. NO ENGINE SHUT DOWN OCCURRED AND NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE GROUND WIRE AT THE NR 2 ENGINE FUEL HEAT VALVE CONNECTOR D1004 BROKEN AT THE PIN. REMOVED AND REPLACED CONNECTOR. PERFORMED ENGINE RUN. FOUND OIL TEMPERATURES IN GREEN RANGE WITH THE NR 2 ENGINE 10 DEGREES HIGHER THROUGHOUT SETTINGS. OPERATIONAL CHECK GOOD. (X)