What was found
ON FLIGHT 3368 THE CREW REPORTED HYDRAULIC 1 LOW QUANTITY MESSAGE ON CLIMBOUT OF LIT, QUANTITY WAS AMBER TOP OF RANGE, AS FLIGHT PROGRESSED QUANTITY CONTINUED TO DROP. ENGINE HYDRAULIC PUMP NR 1 FAILED AND SYSTEM NR 1 FAILED, COMPLIED WITH ABNORMAL PROCEDURES, HYDRAULIC 1 FAIL AND ABNORMAL GEAR EXTENSION. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP IAW EMB 145 AMM 29-10-03. THE OPERATIONAL AND LEAK CHECK WERE GOOD AT THIS TIME. THE AIRCRAFT WAS RETURNED TO SERVICE.