As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK DUE TO HIGH ENG OIL PRESSURE ON NUMBER 2 ENGINE. OIL PRESSURE WAS BETWEEN 64 PSI AND 78 PSI WHILE PASSING THROUGH 23,000 FT. MASTER CAUTION LIGHTS AND ENG CUE LIGHT WERE ALSO FLICKERING BUT NO ENGINE MESSAGE. REPLACED OIL PRESSURE RELIEF VALVE.