As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK DUE TO DROPPING RT ENGINE OIL PRESSURE. THROTTLE WAS PULLED BACK TO IDLE AND ENGINE OIL PRESSURE ROSE TO 40 PSI AND TURNED GREEN. SHORTLY THEREAFTER THE DIGITAL OIL PRESSURE INDICATION DROPPED AND THE RED ICAS MESSAGE, RT ENGINE OIL PRESS LOW, APPEARED. THE RT ENGINE WAS SHUTDOWN ON APPROACH TO LANDING. THE ACFT LANDED SAFELY. REPLACED OIL FILLER CAP ON NR 2 ENGINE. NO LEAKS AFTER TAXI AND ENGINE RUN OPS CHECKS.