As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH INTO TOL, THE FLIGHT CREW NOTICED THE MAIN HYDRAULIC QUANTITY DECLINING. THE FLIGHT CREW FOLLOWED COMPANY EMERGENCY PROCEDURES, DECLARED AN EMERGENCY AND CONTINUED TO TOL FOR AN UNEVENTFUL LANDING. MAINTENANCE INSPECTED THE AIRCRAFT LOCATING A DEFECTIVE BRAKE CONTROL VALVE AT FAULT. MAINTENANCE REPLACED THE CONTROL VALVE IN ACCORDANCE WITH THE MAINTENANCE MANUAL. THE AIRCRAFT WAS RETURNED TO SERVICE. (X)