What was found
IAH - FLT 1769 - THE B-SYSTEM HYDRAULIC QUANTITY DECREASED TO JUST ABOVE ZERO AND WAS ACCOMPANIED BY ILLUMINATION OF THE NR 2 ENGINE B-HYDRAULIC PUMP LOW PRESSURE LIGHT. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. THE NR 2 ENGINE DRIVEN B-SYSTEM HYDRAULIC PUMP WAS FOUND AT FAULT. THE HYDRAULIC PUMP WAS REMOVED AND REPLACED, AND, LEAK AND OPERATIONAL CHECKS WERE GOOD. (X)