As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC PRESSURE SENT TO ZERO IN-FLIGHT. AIRCRAFT RETURNED TO AIRPORT SAFELY. MAINTENANCE FOUND RESERVOIR EMPTY DUE TO MASSIVE LEAK AT RT FLAP ACTUATOR LINES. NEW LINES INSTALLED. RIGHT HYDRAULIC PUMP FAILED TO PRODUCE PRESSURE. REPLACED PUMP AND FILTER. OPS CHECK OK. HOSES FAILED DUE TO AGE. LOCATED IN AREA IMPOSSIBLE TO INSPECT PROPERLY. PUMP FAILED DUE TO FLUID STARVATION.