The standard passenger-carrying Dash 7 is the Series 100, while the type was also offered in pure freighter form as the Series 101. Maximum take-off weight was 42,000 lb, followed shortly after by the Series 102 (passenger variant) and the Series 103 (a combination passenger/freighter variant), which had more powerful engines. Maximum take-of weight was increased to 44,000 lbs. The only major development of the Dash 7 was the Series 150, which featured a higher maximum takeoff weight and greater fuel capacity, boosting range. The Series 151 was the equivalent freighter. Its maximum take-off weight was 47,000 lb. Production of the Dash 7 ended in 1988, following Boeing's takeover of de Havilland Canada.