 In 1974, after 123 production aircraft had been built, a number of improvements were made to the 112, producing the 112A.The doors were fixed by replacing them with new aluminum units, which added still more weight, but had the added benefit of making the cabin quieter.The wing was redesigned internally with increased fuel capacity and a 100 lb increase in maximum takeoff weight (MTOW) to 2,650 lb; After another 30 112s were built, Rockwell offered an option for increased fuel capacity (68 US gallon vs. 48 gallon standard tanks).