As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REFUELING THE NR 1 ENGINE OIL PRESSURE SLOWLY DECLINED INTO THE YELLOW RANGE DOWN TO 20 PSI, THEN DROPPED INTO RED AT 18 PSI, ENGINE WAS SECURED ACCORDING TO CHECKLIST. OIL WAS ON SIDE OF ACFT AND THE RESERVOIR WAS BELOW THE SIGHT GAUGE.