As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - TWENTY MINUTES AFTER TAKEOFF LEFT HYDRAULIC SYSTEM LOST ALL FLUID. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED RIGHT MAIN LANDING GEAR UNLOCK ACTUATOR PRESSURE LINE. ACCOMPLISHED OVERWEIGHT LANDING INSPECTION. SYSTEM GROUND CHECKED NORMAL OPERATION.