As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL 290 AIRSPEED ABOVE 290KTS AIRFRAME HAS INTERMITTANT STRONG VIBRATION DOES NOT CHANGE WITH POWER SETTINGS. INSPECTED AIRCRAFT AND FOUND LOOSE BODY TO WING FAIRING SEAL GUIDE PLATE. TIGHTENED AS REQUIRED. TEST FLEW A/C, NO DEFECTS NOTED.