As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK. FLIGHT CREW REPORTED "B" SYSTEM ENGINE DRIVEN HYDRAULIC PUMP LOW PRESSURE LIGHT ILLUMINATED AND LOSS OF "B" SYSTEM HYDRAULIC FLUID. MAINTENANCE REPLACED NO. 2 ENGINE DRIVEN HYDRAULIC PUMP AND NO. 5 LEADING EDGE SLAT ACTUATOR.