As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, FIGHT CREW REPORTED LOSING GREEN HYD FLUID, AND DECIDED TO RETURN TO MSP. FLIGHT CREW DECLARED AN EMERGENCY FOR LANDING. AIRCRAFT LANDED WITHOUT INCIDENT, AND WAS TOWED TO THE GATE. MSP MAINTENANCE FOUND NR 3 MLG BRAKE LEAKING. REMOVED AND REPLACED NR 3 MLG BRAKE. OPERATION CHECKED GOOD, AIRCRAFT RETURNED TO SERVICE.