What was found
LOST LEFT ENGINE DRIVEN HYD PUMP. [08-08-07] REPLACED LEFT HYD ENG PUMP PER MM 29-11-05. OPS CKS OK. NO LEAKS AFTER SHUTDOWN. AFTER LT HYDRAULIC EDP CHANGE FOUND PUMP LOW PRESSURE LIGHT AND EICAS MSG REPLACED EDP PRESSURE SWITCH. ALSO, REPLACED CONNECTOR ON LT ENGINE HYDRAULIC PUMP DEPRESSURATION VALVE. CHECKS GOOD DURING AND AFTER ENG RUN. NO LEAKS AFTER SHUTDOWN. AIRCRAFT RECEIVED VERIFICATION FLIGHT CHECK AND SYSTEMS OK FOR ETOPS.