As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE, ENROUTE AT 320 APPROXIMATELY 1 HR INTO FLIGHT OIL PRESSURE DROPPED TO 28 PSI IN AMBER, OIL QUANTITY DROPPED TO 2 GALS. DIVERTED. FOUND NR 1 ENGINE OIL CAP DISLODGED. SERVICED NR 1 ENGINE WITH 7 QTS IAW MM 12-13-01, RAN NR 1 ENGINE. NO LEAKS NOTED AT THIS TIME. ACFT OKAY FOR SERVICE. NO DEFECTS NOTED. ALL INDICATION NORMAL ON ENG NR 1.