As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT FLIGHT CREW NOTICED THAT THE LEFT OIL PRESSURE GAUGE WAS GETTING INTO THE YELLOW ARCH AND A FEW MINUTES LATER THE OIL PRESSURE ANNUNCIATOR BEGAN TO FLICKER. PERFORMED PRECAUTIONARY ENGINE SHUTDOWN CHECKLIST TO AVOID DAMAGING THE ENGINE AND LANDED AT THE SCHEDULED STOP. A CERTIFIED REPAIR STATION CONFIRMED THAT THE ENGINE WAS LEAKING OIL FROM THE CORE DUE TO HIGH CASE PRESSURES IN ALL ENGINE ZONES POSSIBLY AS A RESULT OF A FAILED 4 OR 5 CARBINE SEAL.