What was found
CREW REPORTED EXCESSIVE VIBRATION IN FLIGHT DURING CRUISE CONFIGURATION. THE VIBRATION WAS FELT IN YOKE, RUDDER PEDALS, AND SEAT MOUNTS. BOTH SIDES OF HORIZONTAL STABILIZER WERE OBSERVED TO BE OSCILLATING UP AND DOWN AT OUTBOARD SECTIONS. THE FLIGHT CONTINUED TO INTENDED DESTINATION AND LANDED SAFELY. POST FLIGHT EVALUATION BY COMPANY MAINTENANCE FOUND FASTENERS SHEARED AT LT FUSELAGE TO HORIZONTAL STABILIZER FAIRING AND A HOLE CHAFED THROUGH LEADING EDGE OF LT HORIZONTAL STABILIZER IN THE AREA OF FUSELAGE FAIRING. EXCESSIVE END PLAY WAS DISCOVERED AT PITCH TRIM ACTUATOR.