Boeing 367-80 Final Flight

By the time the 367-80 had retired, it had been extensively modified, being used as a test bed for features which would be implemented onto the 707 and other Boeing aircraft. By the 2000s, the major remaining cosmetic differences from its original form were its new JT3D engines, a majorly increased wing area through new flaps, a longer nose cone, and an antenna on the vertical stabiliser