TWA accepted the aircraft on 15 September 1933 with a few modifications (mainly increasing seating to 14 passengers and adding more powerful engines) and subsequently ordered 20 examples of the developed production model which was named the Douglas DC-2.
TWA aceptou o avión o 15 de setembro de 1933 cunhas poucas modificacións (principalmente incrementando a capacidade a 14 pasaxeiros e engadindo motores máis potentes) e pediu 20 unidades do modelo de produción, que foi nomeado Douglas DC-2.