As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT APPROX 20 MINUTES INTO IT ENGINE OIL PRESSURE LIGHT CAME ON. PILOT MADE PRECAUTIONARY LANDING IN CLEAR AREA. THE OIL PRESSURE GAUGE WAS STILL SHOWING GOOD PRESSURE, BUT THE LIGHT WAS ILLUMANTED ON MASTER CAUTION PANEL. REMOVED AND REPLACED OIL PRESSURE SWITCH WITH NEW ONE, CLEARED LIGHT ON MASTER CAUTION PREFORMED OP CHECK GOOD NO OTHER DEFECTS NOTED RETURNED AC TO SERVICE.