As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MMSD TRIP ID NR 812728 CREW REPORTED FEELING AN UNUSUAL VIBRATION IN THE CONTROL COLUMN MOSTLY DURING PITCH MOVEMENT. AN EMERGENCY WAS DECLARED AND AIRCRAFT RETURNED TO MMSD. CREW DISCOVERED A LOOSE EROSION BOOT ON THE RIGHT HORIZONTAL STABILIZER TIP. MAINTENANCE REPLACED THE EROSION BOOT ON THE RIGHT HORIZONTAL STABILIZER TIP. AIRCRAFT WAS RETURNED TO SERVICE.