As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURN BACK - FLT 0320 - ON DEPARTURE FROM PHX EN ROUTE FOR ACA THE HYDRAULIC PUMP B-ENGINE NR 2 LIGHT ILLUMINATED. B-SYSTEM HYDRAULIC QUANTITY DROPPED TO APPROXIMATELY 3/8 FULL, PRESSURE WAS GOOD. MAINTENANCE FOUND NR 2 ENGINE DRIVEN HYDRAULIC PUMP LEAKING. REMOVED AND REPLACED NR 2 ENGINE HYDRAULIC PUMP, PERFORMED ENGINE RUNS, NO MALFUNCTIONS OR LEAKS NOTED PER TASK CARD R5M29002. HYDRAULIC PUMP WAS CONFIRMED FAILURE BY VENDOR.