What was found
(CAN) THE AIRCRAFT TOOK OFF & AFTER CROSSING 1500 FT THE ENGINE 2 LOW OIL PRESS CAS CAME ON. WHEN THE PILOT CHECKED THE RIGHT HAND OIL PRESS IT WAS SHOWING 75 PSI, IN RED, WITH ENGINE EXCEEDANCE CAS MESSAGE. THE AIRCRAFT LANDED AT DEPARTURE AIRPORT, DURING APPROACH AT REDUCED THROTTLE THE RIGHT HAND OIL PRESS WAS SHOWING 75 PSI IN GREEN. ALL OTHER PARAMETERS WERE NORMAL. WHILE ON GROUND THE RIGHT HAND ENGINE OIL PRESS WAS STUCK AT 75 PSI EVEN AFTER ENGINE SHUTDOWN.