As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LIGHT VIBRATION IN COCKPIT DURING CLIMB UP TO FL 300. FLT ATTENDANT REPORTED VIBRATION IN THE TAIL WAS STRONGER. ALL VIBRATION STOPPED AFTER FL300 WHILE STILL CLIMBING. ACCOMPLISHED VIBRATION TROUBLESHOOT IAW MT 53-005 REV G. ACCOMPLISHED ELEVATOR EXCESSIVE PLAY CHECK IAW AMM, ALL CHECKED GOOD.