What was found
FLIGHT 7778, TURN BACK DISCREPANCY. AFTER DEPARTURE, THE PILOT OBSERVED THAT THE ENG OIL TEMP EXCEEDED THE MAXIMUM ALLOWABLE. THE ACFT WAS RETURNED, NO EMER WAS DECLARED. ONCE PARTS ARRIVED, REPLACED THE OIL PRESS & TEMP INDICATOR. OPERATIONS CHECKED GOOD. ACFT WAS RETURNED TO SERVICE.