the boeing 777-300er first diverted to chhatrapati international airport to refuel about eight hours into its flight from southern china to addis ababa .
after topping up it departed for bole international airport in the ethiopian capital , but was forced to return after the flight crew declared an emergency shortly after take-off .
the plane was taken out of service for an inspection and any necessary repairs , meaning passengers were forced to disembark and enter the airport terminal .