The De Havilland Canada DHC-8, commonly known as the Dash 8, is a series of turboprop-powered regional airliners, introduced by de Havilland Canada (DHC) in 1984. DHC was bought by Boeing in 1986, then by Bombardier in 1992, then by Longview Aviation Capital in 2019; Longview revived the De Havilland Canada brand. Powered by two Pratt & Whitney Canada PW150s, it was developed from the Dash 7 with improved cruise performance and lower operational costs, but without STOL performance. The Dash 8 was offered in four sizes: the initial Series 100 (1984-2005), the more powerful Series 200 (1995-2009) with 37-40 seats, the Series 300 (1989-2009) with 50-56 seats, and Series 400 (1999-2022) with 68-90 seats. The QSeries (Q for quiet) are post-1997 variants fitted with active noise control systems.

The Series 300 introduced a longer airframe that was stretched 3.43 metres (11.3 ft) over the Series 100/200 and has a passenger capacity of 50-56. The Series 300 also used the Pratt & Whitney Canada PW123 engines. Rated engine power is between 2,380 shp (1,774 kW) and 2,500 shp (1,864 kW). Design service life is 80,000 flight cycles. Under an extended service program launched in 2017, the service life of Dash 8-300 is extended by 50 percent, or approximately 15 years, to 120,000 flight cycles.
(Source: Wikipedia)