As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT VIBRATION, RETURNED TO RDU. MAINTENANCE PERFORMED RETURN TO SERVICE TEST AND VISUAL INSPECTION OF FLIGHT SURFACES. AIRCRAFT GOOD FOR TEST FLIGHT. COMPLIED WITH TEST FLIGHT, FOUND NO DISCREPANCYS. NO VIBRATION DURING TAKEOFF OR FLIGHT. MAINTENANCE FOUND NO ROLL SPOILER OR LIFT SPOILER DEFECT. AIRCRAFT GOOD FOR SERVICE.