As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 4010 - EN ROUTE FROM PHL TO CVG, CREW NOTICE A FLUCTUATION OF OIL PRESSURE RIGHT ENGINE. OIL PRESSURE WAS FLUCTUATING BETWEEN THE YELLOW AND GREEN ARC'S. CREW ELECTED TO DIVERT TO PIT. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. PIT MAINTENANCE SERVICED THE RIGHT ENGINE WITH FOUR QUARTS OF EXXON 2380 TURBINE OIL. ENGINE GROUND RUNS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.