改進版的31-55,配備改進的儀表和更精緻的的內外部裝飾,裝配1具普惠黃蜂系列發動機 Model 31-55A - 由西北工業公司(英语:Spar Aerospace)在加拿大許可製造。 Aviation. Reynolds Museum. Government of Alberta. [1 December 2019]
conventional propeller propulsion. Some structural strengthening of the main wing spar at the root was required due to the extra weight. This aircraft was subject