As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3571 THE CREW REPORTED THAT DURING CRUISE THEY RECEIVED A HYD SYS 1 FAIL EICAS MESSAGE. THE CREW RAN CHECKLIST AND MONITORED THE SITUATION. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE ENGINE DRIVEN PUMP NR 1. THE OPERATIONAL TEST CHECK WAS GOOD IAW EMB 145 AMM 29-10-03. THE AIRCRAFT WAS RETURNED TO SERVICE.