Investigators conducted interviews with the pilots of Flight 517, and removed rudder components from the aircraft for examination, which helped to establish the cause of the previous crashes of United Flight 585 and USAir Flight 427.
Os investigadores realizaron entrevistas cos pilotos do voo 517, e retiraron os compoñentes do timón do avión para examinalos, o que axudou a esablecer a causa dos accidentes deo voo 585 de United Airlines e do voo 427 de USAir.