What was found
THE FLIGHT CREW REPORTED THAT THE RIGHT HYDRAULIC QUANTITY DECREASED 1% PER 15 MINUTES. NORMAL 98% AFTER SHUTDOWN. A "LOW HYDRAULIC QUANTITY" REFILL EICAS MESSAGE. THE MAINTENANCE VENDOR SERVICED THE LEFT AND RIGHT HYDRAULIC SYSTEM AS PER THE AMM. NO SERVICING REQUIRED, VERIFIED SERVICING WITH ALL ACCUMULATORS AND RESERVOIR PRESSURES BLEED DOWN. VERIFIED SIGHT GLASS QUANTITY, VERIFIED NO LEAKS OR DEFECTS NOTED ON LEFT AND RIGHT SYSTEMS. RAN ENGINES AND APPLIED SYSTEM PRESSURE. EXERCISING HYDRAULIC SYSTEMS ON AIRCRAFT. RECHECKED QUANTITIES, NO FAULTS FOUND. THE AIRCRAFT WAS RETURNED TO SERVICE.