As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 1597 - EN ROUTE FROM ORD-MEX, RIGHT HYDRAULIC FLUID QTY DECREASED TO .56 WHILE LEFT HYDRAULIC FLUID QTY INCREASED TO 1.35. RIGHT HYDRAULIC PUMPS DEACTIVATED AND AIRCRAFT LANDED DFW WITHOUT INCIDENT. REPLACED LEFT AND RIGHT ANTI-SKID SHUTTLE VALVES. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)