What was found
FLT 1433 CLT - LAX - RTF - DURING CLIMB, RIGHT ENGINE OIL TEMP BEGAN FLASHING AT 130. STOPPED CLIMB AT 25000FT AND TEMP INCREASED TO 145 FOR 9 MINUTES. TEMP BEGAN TO DECREASE AT DESCENT POWER AND STABILIZED AT 120. CREW DECLARED AN EMERGENCY AND RETURNED TO FIELD. MAINTENANCE FOUND NR 2 ENGINE OIL QUANTITY OVER-SERVICED. DRAINED APPROXIMATELY 2 GALLONS FROM GEAR BOX SUMP AND REPLACED NR 2 ENGINE IDG COOLING SYSTEM CONTROL SENSOR IAW AIRBUS MAINTENANCE MANUAL 79-32-15.