Cuba Plane Crashes Reviews Consumer & Travel Family Culture
According to the article above:
The airline is notorious for its frequent delays and cancellations, which Cubana blames on a lack of parts and airplanes due to the US trade embargo on the island.
This is what happens when precautions are not made, the article also explains that the Boeing 737 is 30 years old and there were only 3 survivors in critical condition. These kinds of planes need to be overbuilt in such a way that they can operate in high pressure environments, on top of that the airliner is operated by a foreign crew.