Engines were installed by early January 2019 . The first 777-9 body join happened in February for a delivery planned in summer 2020 to Lufthansa . The roll-out of the prototype occurred on March 13 , 2019 , in a low-key employees-only event overshadowed by the crash of an Ethiopian Airlines 737 MAX 8 on March 10
crash of an Ethiopian Airlines 737 MAX 8
Ethiopian Airlines Flight 302
Boeing 777X