As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT THE CREW REPORTED HYD SYS 1 HAD A LOW FLUID QTY WARNING MESSAGE. THE SYS SLOWLY DROPPED TO ZERO. AFTER ABOUT 20 MINUTES THE CREW REPORTED HYD SYS 1 WAS LOST. CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. MX INSPECTED AND R & R THE NR 1 ENGINE HYD PUMP. SERVICED THE HYD SYS. SYS LEAK AND OPS CHECKED GOOD.