As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT NOT GROUNDED: VERTICAL VIBRATION DURING CLIMB THROUGH FL190 AT SPEEDS ABOVE 315 KTS, SLOWING DOWN IMPROVED IT. NOT PRESENT DURING DESCENT. OAT6C DURING CLIMB. REMOVED AND INSTALLED NEW HINGE FITTING (#5) AND HARDWARE ON #2 FITTING. SEE AALA201910289025 ***SUPPLEMENTAL ACTION: SECT.4, AIRCRAFT NOT GROUNDED***