As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT T417/23OCT - ON SLAT EXTENSION RIGHT HYDRAULIC LOW PRESSURE LIGHT ILLUMINATED. LOST RIGHT HYDRAULIC QUANTITY. MANUALLY EXTENDED GEAR. LANDED DFW WITHOUT INCIDENT. FOUND RESIDUE FROM RIGHT SPOILER SHUTOFF VALVE. REPLACED RIGHT SPOILER SHUTOFF VALVE AND SERVICED HYDRAULIC SYSTEM. SYSTEM GROUND CHECKED NORMAL OPERATION.