What was found
FLT 501, EWR-FLL, ON DESCENT LATERAL VIBRATION FELT IN COCKPIT, APPLICATION OF RUDDER INPUT CAUSED VIBRATION TO CEASE. VIBRATION FELT FROM 340 TO -100. ACCOMPLISHED AMM TASK 05-50-00-02 (AIRFRAME VIBRATION SURVEY) FOUND EXCESSIVE PLAY ON RUDDER TRAILING EDGE PLAY CHECK, FOUND GREEN SYSTEM RUDDER SERVO WITH 14MM OF PLAY. REMOVED AND REPLACED GREEN SYS RUDDER SERVO CONTROL (1025GM) IAW 27-24-51, OPS CHECK NORM, NO LEAKS NOTED.