As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THRU APPROXIMATELY FL 1800 AT 320KTS AND IN LIGHT CHOP ENCOUNTERED AIRFRAME VIBRATION. VIBRATION STOPPED BY INCREASING PITCH AND CLIMB RATE AND DECREASING SPEED. VIBRATION AGAIN ENCOUNTERED AT FLT260 AT .79 MACH STOPPED BY DECREASING SPEED SEE VIBRATION. ADJUSTED LEFT HAND INBOARD ELEVATOR SERVO IAW A320 AMM 27-34-00-820-003-B.