What was found
DURING CRUISE FROM KSJC TO KRFD, THE NR 3 ENGINE LOW OIL PRESSURE LIGHT CAME ON. THE CREW RETARDED THE THROTTLE TO IDLE AND THE LIGHT REMAINED ON. THE ENGINE OIL PRESSURE, QUANTITY, AND TEMPERATURE WERE NORMAL. THE CREW DECIDED TO SHUT DOWN THE ENGINE AS A PRECAUTIONARY MEASURE, AND BYPASS KRFD AND FLY DIRECT TO KTOL WHERE THE AIRCRAFT LANDED WITHOUT INCIDENT. WINDMILLING OIL PRESSURE WAS APPROXIMATELY FIVE PSI. MAINTENANCE INSPECTED THE ENGINE AND FOUND THE OIL PRESSURE TRANSMITTER AT FAULT. MAINTENANCE REPLACED THE OIL PRESSURE TRANSMITTER, AND THE OPERATIONAL CHECK WAS SUCCESSFUL. THE AIRCRAFT WAS RETURNED TO SERVICE.