As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT "B" HYDRAULIC SYSTEM QUANTITY DECREASED TO UNUSEABLE LEVEL. EMERGENCY DECLARED. LANDING UNEVENTFUL. AIRCRAFT GROUNDED. MAINTENANCE FOUND "B" SYSTEM HYDRAULIC ACOUSTIC FILTER LEAKING. REMOVED AND REPLACED THE FILTER IAW AMM 29-11-27. OPS AND LEAK CHECKED NORMAL.