As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CLIMBING THROUGH FL 270 WE STARTED FEELING VIBRATION WORSE IN BACK OF AIRPLANE SPEED 305 SLOWED TO 280 AND VIBRATION DISSIPATED. MAINTENANCE ACCOMPLISHED ELEVATOR FREE PLAY CHECK AND FOUND THE LEFT HAND ELEVATOR #3 HINGE FITTING TO HAVE EXCESSIVE PLAY. REPLACED HINGE FITTING AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 27-34-41.