Groundings of entire classes of aircraft out of equipment safety concerns is unusual , but this has occurred to the de Havilland Comet in 1954 after multiple crashes due to metal fatigue and hull failure , the McDonnell Douglas DC-10 in 1979 after the crash of American Airlines Flight 191 due to engine loss , the Boeing 787 Dreamliner in 2013 after its battery problems , and the Boeing 737 MAX in 2019 after two crashes preliminarily tied to a flight control system
American Airlines Flight 191
American Airlines Flight 191
Aviation safety