As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, PASSING THROUGH 210 KTS A HEAVY VIBRATION STARTED THROUGH CONTROL COLUMN. WITH AUTO PILOT ENGAGED, AFTER SLOWING IT WAS NOT AS INTENSIVE. BUT STILL PREVALENT, MEL 2201 APPLIED. REPAIRED CRACKED SUPPORT BEAM FOR AHRS MOUNTS IAW EO EM-53MR-840. AUTOPILOT OPS CHECKS GOOD. FUNCTIONAL CHECK FLIGHT REVEALED NO DISCREPANCIES. MEL ITEM RESTORED. AIRCRAFT RETURNED TO SERVICE.