As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEM - FL 175 - AT 28,000 FEET, 138 MILES WEST OF MEM, THE NR 1 ENGINE HAD A LOSS OF OIL AS INDICATED ON THE OIL QUANTITY INDICATOR. FLIGHT DIVERTED INTO MEM AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY DECLARED. THE NR 1 ENGINE WAS NOT SHUT DOWN IN-FLIGHT. MAINTENANCE FOUND THE NR 1 ENGINE CSD GARLOCK SEAL LEAKING. REPLACED SAME. SERVICED ENGINE OIL. OPERATIONAL CHECK AND LEAK CHECK GOOD. (X)