As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ASH 7281 IAD. HYDRAULIC SYSTEM NR 2 LOW PRESSURE CAUTION WITH ASSOCIATED INBOARD SPOILERS, INBOARD FLIGHT SPOILERS AND INBOARD BRAKES CAUTION MESSAGES. THE CREW REPORTED THAT ATC DECLARED AN EMERGENCY DUE TO THE REPORTED BRAKES CAUTION MESSAGE. MX R/R PRESSURE LINE. RESET THE SYSTEM. OP'S AND LEAK CHECK GOOD.