there's a book on this, "How Boeing Defied the Airbus Challenge: An Insider's Account" I don't know if it lays out the safety math but it goes very deep on twi

there's a book on this, "How Boeing Defied the Airbus Challenge: An Insider's Account" I don't know if it lays out the safety math but it goes very deep on twin engine safety and some of the fights over the a340 vs. 777 regulations