Firefighters spray foam on the engine of a Boeing 737-800 of the German company XL Airways on the tarmac of Nikola Tesla Airport in Belgrade October 18, 2008. A plane carrying 169 people on a flight from Germany to Turkey made an emergency landing at Belgrade on Saturday after an engine failure, an aviation official said. A spokesman for Belgrade airport said the Boeing 737-800 with 163 passengers and six crew on board made an emergency landing at 7:47 a.m. [Agencies]