As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT # 2761, FLL-SXM(AIR TURNBACK TO FLL). EXPERIOENCED A VIBRATION AT FL 250 CLIMBING @ 300KTS. SLOWED SPEED TO 280KTS, ONCE AIRCRAFT ACCELERATES AGAIN TO 300KTS @ FL 310 EXPERIENCED MODERATE UPSET ; REF LG. PG. 3128815 ITEM 1 (A/C VIBES) HINGE POINT INBD OF ACUATOR 34CE1 ON THE ELEVATOR HAS EXCESSIVE PLAY (SUPPLEMENTAL INFORMATION TO FOLLOW)