As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE GREEN HYDRAULIC SYSTEM QUANTITY AND PRESSURE INDICATED LOW. SHUT DOWN THE GREEN HYDRAULIC SYSTEM AND AIRCRAFT DIVERTED TO DTW. MANUALLY EXTENDED THE LANDING GEAR AND THE AIRCRAFT LANDED WITHOUT INCIDENT. AIRCRAFT WAS TOWED TO THE GATE. REPLACED THE HYDRAULIC QUANTITY TRANSMITTER AND LOW LEVEL SENSOR. OPERATIONAL CHECK GOOD. SPECIFIC PART CAUSING PROBLEM PENDING.