The Rockwell Commander 685 or Aero Commander 685 is a light-twin piston-engined aircraft with a pressurized cabin originally built by the Aero Commander company, a division of Rockwell International from 1965. The predecessor model was the Aero Commander 690 and the next generation are . The Aero Commander 685 had the ICAO AC6L The introduction was in 1971 and the retired in 1976; in this time are built 66 aircraft.