As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT INTO DTW, THE RIGHT HYDRAULIC QUANTITY DROPPED TO TWO GALLONS WITH LOW PRESSURE LIGHT ILLUMINATED. FLIGHT CREW DECLARED AN EMERGENCY AND AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND TEMPERATUREFLEX LINE CHAFED. REPLACED LINE. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.