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EntwurfsgrundlagenUm einen ordnungsgemäßen und vor allem sicheren Betrieb zu gewährleisten, verpflichtet das Schweizer Luftfahrtgesetz die Flughafen Zürich AG (FZAG), für die entsprechende Infrastruktur zu sorgen. Triebwerksprobeläufe sind für einen sicheren Betrieb notwendig, da die Triebwerke in Wartungsintervallen oder nach Reparaturmaßnahmen getestet werden müssen, bevor das Flugzeug wieder seinen Flugbetrieb aufnehmen kann.Put an end to the noise -New construction of a noise reduction hangar for traffic airplanes at the airport Zurich For being able to guarantee a secure air traffic there have to be proceeded engine test runs at many airports. As most of these test runs are taking place outside of flight operations, which means at night, a ban on night flights would be useless if the sound propagation would be realized unhindered during the test. Therefore noise reduction hangars are constructed to impede the sound propagation. The hangar at the international airport Zurich offers place for traffic airplanes up to the size of a Boeing 747-8. In the case of this approximately 25.5 million Euros expensive construction only the function determines the design. The developed noise reduction installation offers next to the main purpose of reducing the noise emission the other big advantage of significantly increased availability independent of weather conditions.