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To ensure the safety of the traveling public, airlines maintain a stringent maintenance schedule for each aircraft. As part of this regularly scheduled maintenance, the Federal Aviation Administration (FAA) requires aircraft ground run-ups.  Aircraft ground run-ups are routine aircraft engine maintenance tests, which require the operation of an engine at high power on the ground for several minutes generating elevated noise levels. 

Approximately 800 aircraft ground run-ups are conducted at MKE every year.  These tests occur during both daytime and nighttime hours.  To minimize aircraft ground run-up noise, in 2002, MKE completed construction of a massive, three-sided structure, referred to as a Ground Run-Up Enclosure (GRE).  The GRE reduces aircraft engine run-up noise by more than 50% through its aerodynamic design and the use of sound reducing panels.

MKE was the 5th airport in the nation to employ this advanced technology to reduce noise for airport neighbors.  For detailed information on MKE's GRE, click on the links below.

You may learn more about GRE technology here: GRE-Brochure.pdf

You may view current conditions at the GRE using google chrome or firefox here:  Current GRE Conditions

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Milwaukee Mitchell International Airport | 5300 South Howell Ave. Milwaukee, WI 53207

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