As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT AN ALTITUDE OF 10000 FT, FELT A VIBRATION ON THE LEFT YOKE. WITH A AIRSPEED OF 290 KIAS. RECEIVED A TURN TO CAE AND ON THE APPROACH WITH THE AUTOPILOT OFF IT HAPPENED AGAIN. A/C RETURNED TO CAE AFTER T/O, EMERGENCY WAS DECLARED, FLTS 4321, 4586 CX.