What was found
DURING CRUISE AT FL 350, HYD PRESSURE AND FLUID DECREASED, RAN ABNORMAL CHECKLIST. FLUID STOPPED AT AUX LEVEL, LANDED DFW, EMERGENCY DECLARED. REMOVED AND REPLACED RUDDER PUMP, NR 2 ENG PUMP, CASE DRAIN AND SYSTEM FILTERS. SERVICED HYD SYS AND CHANGED CASE DRAIN FILTERS AGAIN. OPENED DEFERRAL TO REPLACE CASE DRAIN AND SYS FILTERS IN 20 HOURS PER M/M 27-24-02.