As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) WHILE THE AIRCRAFT WAS AT CRUISE SPEED AT 20,000 FT 50 MILES SOUTH OF YGL, NR1 OIL PRESSURE WARNING LIGHT CAME ON. PILOT SHUTDOWN NR1 ENGINE AND LANDED SAFELY IN YGL.WE FOUND THAT THE OIL COOLER WAS FULL OF ENGINE OIL AND THE L/H MAIN GEAR AS WELL. WE REPLACED THE OIL COOLER, CLEANED EVERYTHING UP, SERVICED THE ENGINE OIL. MAX POWER RUN CARRIED OUT FOR 15 MINUTES. NO OIL LEAK. AIRCRAFT RELEASED AND BACK TO SERVICE.