As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION OCCURRED IN FLIGHT WITH A 10 KNOT RAPID DECREASE IN AIRSPEED (AS IF THRUST REVERSER PARTIALLY DEPLOYED). NO THRUST REVERSER COCKPIT INDICATIONS ILLUMINATED. ON POSTFLIGHT NOTED LOWER RT THRUST REVERSER BUCKET STILL DEPLOYED ABOUT .2500 INCH AND NOT FULLY STOWED. PERFORMED UNSCHEDULED ACCIDENTAL IN-FLIGHT THRUST REVERSER DEPLOYMENT CHECK IAW MM 5-50-00. NO DEFECTS OR DAMAGE FOUND. REMOVED AND REPLACED RT THRUST REVERSER. ALL WORK IAW MM 78-31-00. OPS AND LEAK CHECKED GOOD.