As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LEFT ENGINE OIL PRESSURE FLUCTUATES BETWEEN 32 - 28 PSI IN FLIGHT. LEFT OIL PRESSURE WARNING MESSAGE WOULD COME ON OCCASIONALLY. CREW DIVERTED AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED, REMOVED AND REPLACED CARBON SEALS AND MATING RINGS FOR LEFT ENGINE IDG (INTEGRATED DRIVE GENERATOR) AND STARTER AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.