As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DESCENT THROUGH 9000 FEET LARGE VIBRATIONS BEGAN. NO CAS MESSAGES AND NO MAJOR HYDRAULIC OR MECHANICAL IRREGULARITIES NOTED. (FLT 4970) CLOSED UPON ARRIVAL, FOUND ADG DEPLOYED. PERFORMED ADG DEPLOYMENT CHECK IAW AMM. NO DEFECTS NOTED. RE-STOWED ADG IAW AMM AND REMOVED AND REPLACED AUTO-DEPLOY CONTROL PANEL IAW AMM. OPS CHECKS GOOD.