As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YYZ/BWI - FLT 3393 - THE NR 2 ENGINE OIL PRESSURE WARNING LIGHT ILLUMINATED, FOLLOWED BY LOSS OF OIL PRESSURE ON THE NR 2 ENGINE OIL PRESSURE GAUGE. POWER WAS REDUCED IMMEDIATELY AND THE ENGINE WAS SHUT DOWN IN-FLIGHT. AIRCRAFT DIVERTED TO SCE AND LANDED WITHOUT INCIDENT. REMOVED AND REPLACED OIL COOLER, OIL COOLER VALVE, AND THE VALVE ACTUATOR.