The most famous uncontained engine failure incident was the 1989 Sioux City crash of United 232, where exploding fan blade bits took out all hydraulic lines and the plane became nearly uncontrollable. The pilots almost got it on the ground using only engine thrust to control the plane, but it crashed as it came in and 112 people died.
Similar hydraulic problems arising from uncontained engine failure caused Baikal Airlines Flight 130 to go down in 1994 (125 fatalities), and a 1984 Aeroflot crash (110 fatalities).
Shrapnel from exploding engines also killed two passengers on Delta 1288 in 1996, and led to a fatality in in a 1973 incident on National Airlines 27.
Uncontained engine failure is not common and it's very serious.
https://en.wikipedia.org/wiki/Turbine_engine_failure#Notable...