As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4484 THE CREW REPORTED A HYDRAULIC 1 LOW MESSAGE. THE CREW DECLARED AN EMERGENCY AND LANDED AT DESTINATION WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. SERVICED HYD 1 SYSTEM IAW 12-13-01. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.