As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE PILOT WRITE-UP LOG PAGE 541210 07/07/2010. AIR TURNBACK. LEFT ENGINE OIL PRESSURE GAUGE INOP. FOUND LEFT ENGINE OIL PRESSURE CIRCUIT BREAKER RELEASED. RESET LEFT ENGINE OIL PRESSURE CIRCUIT BREAKER AND PERFORMED LEFT ENGINE IDLE RUN. LEFT ENGINE OIL PRESSURE INDICATION NORMAL. NO PARTS FOUND TO BE DEFECTIVE.