What was found
LEFT ENG BLEED OFF INITIALLY, RAN QRH. NEEDED ENGINE ANTI ICE AND AFTER SELECTING ISOLATION SWITCH ON IN ACCORDANCE WITH QRH, AND AT FL320, THE CABIN ALTITUDE STARTED TO CLIMB FOLLOWED BY R ENG BLEED OFF AND RED CABIN ALTITUDE MESSAGE. INTEROGATED EICAS FOR AUTO EVENT UPON ENTERING AIRCRAFT AND FOUND ' R ENG BLEED VLV' EVENT WITH PRECOOLER TEMP SHOWING 505 DEG AT TIME OF EVENT. RAN BOTH ENGINES IN GATE PER 757 QRH AND BOTH PRSOV BLEEDS OPERATED NORMALLY WITH NO 'BLEED OFF' LIGHTS ILLUMINATING. PERFORMED RFCC ADJUTMENT/TEST WITH ENGINES RUNNING REF 757 AMM 36-11-18-5-2 ON BOTH ENGINES, TEST WAS NORMAL. ALSO MONITORED BOTH PRECOOL TEMPS DURING RUN AND FOUND TEMPS TO BE WITHIN NORMAL RANGE.