As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC NR 1 LOW QUANTITY LEVEL WENT FROM TOP OF YELLOW TO BOTTOM OF YELLOW IN LESS THAN 40 MINUTES. DID NOT GET A HYDRAULIC FAIL MESSAGE. REMOVED AND REPLACED NR 1 RUDDER ACTUATOR AND COMPLETED RUDDER BACKLASH CHECK. ALL LEAK AND OPERATIONAL/FUNCTIONAL CHECKS WERE GOOD AIRCRAFT RETURNED TO SERVICE.