As per 17DEC12 GDS timetable and inventory display, Emirates is swapping operational aircraft on following routes, starting 01FEB13.
Dubai – Hamburg EK061/062 Boeing 777-200LR replaces -300ER
Dubai – Lisbon Boeing 777-200LR operating instead of planned -300ER. This will replace existing -200ER service
Dubai – Washington Dulles Boeing 777-300ER replaces -200LR
Operational aircraft change will also be in effect on/after 31MAR13.