As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, LOST ALL "A" SYSTEM HYDRAULIC FLUID ABRUPTLY. REPORTED GRINDING NOISE FROM THE NR 1 ENGINE PRIOR TO LOSS. FLIGHT DECLARED AN EMERGENCY AND RETURNED TO MSP WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 2 AND NR 3 LEADING EDGE SLAT ACTUATORS. OPERATIONAL CHECK NORMAL.