As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCREPENCY:MAJOR VIBRATION IN AFT GALLEY WAS "UNDER THE FEET AND FELT VERTICAL. ON DESCANT FA'S REPORTED VIBRATION GOT WORSE. SPEED WAS CONSTANT 280KTS. CORRECTIVE ACTION: MX ACTION REF LP207661 FOR SEC2 MX C/W ELEVATOR & RUDDER FREE PLAY CHECKS GOOD. NO DEFECTS FOUND AT THIS TIME. ALL MOVEMENTS ARE WITHIN LIMITS AC OK TO CONTINUE REF TSM 27-20-00-810-802-A & TSM 27-30-00-810-850-A