What was found
PDIS 793 79-01 5154 09JUN22 MEM OPEN U CLIMBING THOUGH 17,000MSL ON CLIMBOUT FROM MEM RECEIVED A R ENG OIL PRESS EICAS MESSAGE. EICAS INDICATED ZERO OIL QUANTITY AND OIL PRESSURE WAS FLUCTUATING. BY THE TIME I HAD PULLED OUT THE QRH, THE R OIL PRESSURE HAD DROPPED INTO THE RED AND WE ACCOMPLISHED A PRECAUTIONARY ENGINE SHUTDOWN OF THE RIGHT ENGINE. QUANTITY INDICATED ZERO BUT THERE WAS STILL SOME PRESSURE WHEN WE SHUT IT DOWN. RETURNED TO MEM FOR A FLAPS 20 SINGLE ENGINE LANDING. FIRE DEPARTMENT CHECKED THE AIRCRAFT AND SAW NO HAZARDS SO WE TAXIED TO THE GATE. EMERGENCY WAS DECLARED. ***EMERGENCY DECLARED*** UPDT 09JUN22 22:22 MEM U VERIFIED THAT RIGHT ENG OIL TANK IS EMPTY. EVIDENCE OF OIL LEAK AT SCAVENGE PUMP. REMOVED AND REPLACED R/H ENG PER W/C 7180210-02-02. ALL OPS CHECKS AND LEAK CHECKS GOOD PER W/C 7180210-02-02. ENGINE, POWERPLANT, PW2037 NON R PRATT & WHITNEY PW2037 726717