What was found
PHX - AIR TURN BACK - FLT 0081 - AFTER TAKEOFF FROM PHX EN ROUTE TO BWI DURING INITIAL CLIMB A RT HYD QUANTITY EICAS MESSAGE ILLUMINATED FOLLOWED BY A RT HYD SYSTEM PRESSURE EICAS MESSAGE, QUANTITY INDICATED .26, TURNED BACK TO PHX AND LANDED UNEVENTFULLY. MAINTENANCE REMOVED AND REPLACED THE NR 2 ENGINE HYD PUMP IAW T/C R5M29601, LEAK AND OPERATIONAL CHECK WAS GOOD. VENDOR CONFIRMED FAILURE OF NR 2 ENGINE HYD PUMP. BENCH TEST WAS NOT PERFORMED DUE TO THICK BLACK BURNT SLUDGE FOUND AT INLET PORT DURING ACCEPTANCE INSPECTION.