As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT OF MKE, CREW NOTICED BOTH HYDRAULIC SYSTEM LIGHTS ILLUMINATED. CREW DETERMINED THAT FLUID LOSS WAS IN 'B' SYSTEM AND CLOSED PUMP SWITCHES. FLIGHT LANDED AT DTW WITHOUT INCIDENT. DTW MAINTENANCE FOUND GROUND INNERCONNECT LEAKING AND REPLACED SAME.