What was found
LOG PAGE 107160. DISCREPANCY: #4 ENGINE OIL TEMP @ 150 @ 15 MINUTES ENGINE SHUT DOWN AS PER AOM. AIRCRAFT RETURNED TO KMIA AND LANDED OVERWEIGHT UNEVENTFUL. CORRECTIVE ACTION: TROUBLESHOOTING INDICATED OPENED RESISTANCE AT TEMP BULB. REMOVED AND REPLACED #4 ENGINE OIL TEMPERATURE BULB IAW MM 79-34-1. PERFORMED OPERATIONAL CHECK IAW MM 71-00 AND FOUND NORMAL. PERFORMED OVERWEIGHT LANDING CHECK IAW J/C 6372 "A" INSPECTION NO DISCREPANCIES NOTED. AIRCRAFT RETURNED TO SERVICE.