As part of an airliner’s certification process, the manufacturers take into account what the likelihood of non-normal operation of that aircraft’s various components and systems would be. The process is rigorous and scientific.
Twin engine airliners have become far more popular and practical to operate than four engine aircraft are. The current twin engine front-runners are the Boeing 737 NG series and the 777 and from the Airbus stable
Forty seven years of my life was spent as an airline pilot flying jet aircraft. During that time I experienced two calamitous engine failures, one of which was accompanied by