Testing an airplane's engines is not as simple as taking a car to the dynamometer. That's why Flughafen Zürich, administrator of Zurich airport, asked WTM Engineers to create a special hangar to contain engine noise.
One of the planes recently tested in that space was a Boeing 777 and, as we can see in the videos that have since appeared on the internet, something went wrong during the test.
Built using a steel structure and precast concrete components, this structure is able to reduce noise emissions from the 156 dB recorded at the foot of the engine to less than 60 dB outside the hangar, all thanks to a wall deflection beam located at the rear of the hangar.
SWISS 777 GE-90 engine test destroys noise protection hangar at Zurich Airport. No reported injuries. pic.twitter.com/MUQMbjNN0c
— Breaking Aviation News & Videos (@aviationbrk) December 4, 2021
It was precisely this wall that, during the test of a Boeing 777, was eventually destroyed, with the acoustic protection material being scattered across the airport runway.
As can be seen in the images above, at least one of the deflection panels was destroyed and the acoustic protection material was spread over a huge area of the airport yard.
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