What was found
FLT 7650 - IAD-SYR - DURING APPROACH, MADE A SCHEDULED LANDING WITH ONE DISCREPANCY WHICH WAS BOTH HYDRAULICS SYSTEM DROPPED TO 0 PSI UPON LANDING GEAR EXTENSION. AIRCRAFT LANDED WENT TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED TEE FITTING AND TWO CHECK VALVES UNDERNEATH RT ACM PANEL. OPS CHECK OK. AIRCRAFT RELEASED AND RETURNED TO SERVICE. (M)