As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE NR 2 CENTER HYDRAULIC PUMP PRESSURE LIGHT AND EICAS MESSAGE ILLUMINATED. THIS WAS SHORTLY FOLLOWED BY NR 1 CENTER HYDRAULIC PUMP PRESSURE LIGHT AND EICAS MESSAGE. CENTER HYDRAULIC SYSTEM QUANTITY THEN FELL TO ZERO. FOLLOWED COM PROCEDURES. RETURNED TO MSP FOR AN UNEVENTFUL LANDING. MAINTENANCE REPLACED THE CENTER ELECTRIC HYDRAULIC PUMP AND SERVICED THE CENTER SYSTEM. OPERATIONAL CHECK OK.