What was found
FLT 4411 - DURING FLIGHT FROM SBN TO ATL, CREW REPORTED HYDRAULIC 3 PRESSURE EICAS MESSAGE DURING INITIAL DESCENT TOWARD ATL. SYNOPITC PAGE SHOWED HYDRAULIC QTY OF 5 PERCENT IN NR 3. CREW FOLLOWED QRH FOR ABNORMAL PROCEDURES, INCLUDING MANUAL GEAR EXTENSION. CREW DECLARED AN EMERGENCY AND LANDED SAFELY AT BNA. MAINTENANCE ASA REPRESENTATIVES AT BNA REMOVED AND REPLACED SYSTEM 3A ALT CURRENT MOTOR PUMP IAW 29-12-03. OPERATIONAL AND LEAK CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. (M)