What was found
DURING FLIGHT 3151, CREW REPORTED LT PROP OIL PRESSURE FLUCTUATING. PROP OIL PRESSURE GAUGE GIVES ERRATIC READING FROM 0-200 PSI FOR A MINUTE OR SO, THEN CONTINUES TO GIVE ERRATIC READING. QRH COMPLETE AND MX HAS US TRIP AND RESET C/B J11. CONDITION CONTINUES. AIR RETURN TO MSP. MAINTENANCE FOUND LOOSE WIRE IN SPLICE. REPLACED SPLICE, OPS CHECK GOOD.