What was found
VIBRATION DURING CLIMB OUT MORE PRONOUNCED IN AFT CABIN FLOOR. STOPPED BELOW 300KNOTS. CLIMBING THROUGH FL180,5 DEGREE PITCH, CLEAN CONFIGURATION. AIRCRAFT WAS GROUNDED. MAINTENANCE FOUND EXCESSIVE PLAY ON THE RIGHT ELEVATOR AND REPLACED HINGE ARM END FITTINGS NR 1, 2 AND 3 IAW AMM 55-16-42.