What was found
THE TOP HALF OF THE RUDDER SEPARATED AND DEPARTED ACFT LANDING ON NEW YORK THRUWAY. UNEVENTFUL LANDING MADE. INVESTIGATION FOUND THE TOP RUDDER HINGE ('NEW' TYPE TRIPLE DESIGN) FAILED FIRST FOLLOWED BY STRUCTURAL OVERLOAD OF RUDDER TUBULAR SPAR, AND SUBSEQUENT RUDDER SEPARATION APPROXIMATELY 6 INCHES BELOW TOP HINGE. 'NEW' TYPE TRIPLE HINGE INSTALLED PER AD 79-10-10 ON 6-15-91. TRIPLE HINGE TT: 857 HOURS. TOTAL ACFT TIME: 5,420.7 HOURS.