What was found
UPON CLIMB-OUT FROM BWI, THE NR 1 ENGINE OIL TEMP WENT TO 120 DEGREES FOR APPROXIMATELY 10 MINUTES. A/C RETURNED TO FIELD, BWI, AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT SYSTEM, REMOVED AND REPLACED NR 1 ENGINE OIL TEMP BULB, AND OIL COOLER DIVERTER VALVE IAW MM. PERFORMED TEST FLIGHT SATISFACTORY. A/C RETURNED TO SERVICE. (M)