What was found
#2 ENGINE DRIVEN HYDRAULIC PUMP LOW PRESSURE LIGHT ILLUMINATED ON CLIMNBOUT. FOLLOWED BY B SYSTEM QTY. ON DESCENT 1 ENGINE DRIVEN 'A' SYSTEM PUMP LOW PRESSURE LIGHT. / REPLACED #2 ENGINE HYDRAULIC PUMP PER M/M 29-11-11 OPS CHECKS AND LEAK CHECKS OK. REPLACED #2 ENGINE CASE DRAW FILTER AND #2 ELECT HYD PUMP CASE DRAIN FILTERS PER M/M 29-11-51 LEAK CHECKS O.K. REMOVED AND REPLACED #1 ELECT CASE DRAIN FILTERS PER M/M 29-11-51 RAN BOTH ENGINES PER M/M 71-00-00 ALL PRESSURES NORMALPN OFF/ON: 849589 S/N OFF: MX780418 S/N ON: MX791278ISSUE # 3477884