What was found
INFLIGHT ENGINE SHUTDOWN, DUE TO A HIGH OIL PRESSURE INDICATION. PERFORMED A VISUAL INSPECTION OF RT ENGINE WITH NO ISSUES. PERFORMED A GROUND RUN TO CONFIRM HIGH OIL PRESSURE & DID NOT FIND OIL PRESSURE HIGH, FOUND OIL PRESSURE LOW, SHOWING 34 PSI AT IDLE & 39 PSI AT TAKEOFF POWER. INSTALLED A DIRECT READING GAUGE & PERFORMED A GROUND RUN & CONFIRMED BOTH AIRFRAME & ENGINE OIL PRESSURE WERE READING THE SAME. SWAPPED BREATHER VALVES FROM LT TO RT & ADJUSTING PRESSURE TO 35 PSI AT IDLE, 40 PSI AT 88% N2 & 42 PSI AT TAKEOFF POWER. LT & RT ENGINE BREATHER VALVES WERE FOUND IN SERVICEABLE CONDITION. ALL GROUND RUNS FOR LEAK CHECK WERE PERFORMED WITH SATISFACTORY RESULTS. OIL PRESSURE WITHIN LIMITS.