As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED LOSS OF LEFT HYDRAULIC SYSTEM PRESSURE AND QUANTITY LOSS IN FLIGHT. EMERGENCY DECLARED FLIGHT LANDED DFW WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED O-RING ON MIDDLE FITTING ON NUMBER 2 SPOILER ACTUATOR ON LEFT WING. SYSTEM GROUND CHECK NORMAL OPERATION.