What was found
IAD-FLT 3764- CREW REPORTED ELEVATOR SEVERE AND CONTINUOUS SHUTTER ABOVE 280 KNOTS. THE CREW DIVERTED TO BWI WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED ELEVATOR CABLE TENSION CHECKS FOUND TO BE WITHIN MANUFACTURER LIMITS. CHECKED SERVO-TAB DEFLECTION FOUND TO BE WITHIN MANUFACTURER LIMITS. INSPECTED ENTIRE TAIL SECTION AS WELL AS ALL EXTERIOR PANELS NO DEFECTS NOTED. THE AIRCRAFT WAS TEST FLOWN SATISFACTORILY. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.