As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN THE HYDRAULIC PUMPS WERE TURNED ON DURING DESCENT, THE RIGHT HYDRAULIC SYSTEM FAILED COMPLETELY LOSING PRESSURE AND QUANTITY. CREW COMPLIED WITH COM PROCEDURES: LOSS OF RIGHT HYDRAULIC SYSTEM AND EMERGENCY GEAR EXTENSION. LANDING WAS NORMAL AND UNEVENTFUL AT DTW. MAINTENANCE FOUND THAT THE RUDDER POWER SHUTOFF VALVE AT THE PRESSURE PORT WAS CRACKED. REPLACED THE SHUTOFF VALVE AND SERVICED THE SYSTEM. LEAK CHECK OK. AIRCRAFT RETURNED TO SERVICE.