As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, RIGHT HYDRAULIC QUANTITY DROPPED TO 2 GALLONS. THE RIGHT HYDRAULIC PUMPS AND QUANTITY INCREASED TO 10 GALLONS DURING DESCENT. THE PUMPS WERE TURNED BACK ON AND THE QUANTITY ON THE RIGHT SIDE WENT TO ZERO. THE GEAR WAS EXTENDED MANUALLY. FOUND THE LEFT MAIN LANDING GEAR RETRACT CYLINDER LEAKING. REPLACED THE LEFT MAIN LANDING GEAR RETRACT CYLINDER IAW DC-9 MM 32-32-02-2-0004.