In its last report, the Transport Safety Board of Canada recommends the installation of a stall warning system on de Havilland DHC-2 Beaver aircraft.
The initial 1948 design of the aircraft didn't include any stall warning system because, according to the manufacturer, "the stall is gentle at all normal conditions of loads and flap and may be anticipated by a slight vibration.” Transport Canada’s Civil Aviation Directorate also conducted flight tests on the DHC-2 to evaluate the aircraft's stall characteristics. Flight test engineers described the stall as gentle and reported a conventional stall recovery.
Air Saguenay agrees, saying that on the Beaver ''the pilot will feel the stall on the control wheel. This aircraft warns a lot''.
What do you think: is the installation of a stall warning system on the Beaver a must? Are all these accidents related to a bad design or human factors?
See the original news release:
TSB recommends stall warning system following investigation into fatal August 2015 collision with terrain near Tadoussac, Quebec
http://www.tsb.gc.ca/eng/medias-media/communiques/aviation/2017/a15q0120-20170907.asp