The delivery is the first of 10 787s that Ethiopian will receive through 2016. The airline is the first outside of Japan to receive the type.
The aircraft is registered ET-AOQ and has manufacturer's serial number 34745, according to the Flightglobal Ascend database. It uses GEnx-1B64 engines and was financed with a US Export-Import Bank loan guaranteed by JP Morgan.
The carrier will fly the widebody twinjet to Washington Dulles airport on 15 August and on to Addis Ababa on 16 August, according to Boeing.
Ethiopian will begin daily flights between Washington and Addis Ababa using the 787 on 20 September, replacing a Boeing 777-200LR, according to the Airline Route website,