As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS ON DESCENT, RIGHT ENGINE OIL PRESSURE WENT INTO YELLOW THEN RED AT LOW THRUST POWER SETTING. AS FLIGHT PROGRESSED IT TOOK HIGHER THRUST SETTINGS TO KEEP OIL PRESSURE OUT OF THE CAUTION RANGE. RIGHT ENGINE SHUT DOWN UPON LANDING. MAINTENANCE REMOVED AND REPLACED RIGHT HAND ENGINE LUBE AND SCAVANGE PUMP IAW AMM 79-21-03. OPS TEST & LEAK CHECK GOOD.