Germany-bound plane sends hijacking alert weeks after Machchhar case, radio glitch blamed. A Greece-Germany flight triggered an emergency at Nuremberg Airport after it transmitted the '7500' hijacking code to authorities, and its pilot went silent as he couldn't be reached by radio. Two Eurofighter jets then escorted the plane till it landed safely, and the airline later blamed a radio glitch for the situation. This comes weeks after the flydubai-Smit Machchhar case.