SU-BTV has been at Spirit of St Louis Airport (KSUS) on previous occasions. Dassault maintenance is available there.
"Dassault Falcon Jet St. Louis
Line Service Center
St Louis, a 27,000 sq. ft. facility at Spirit of St. Louis (KSUS) airport, is authorized to perform “12 Month” through “48 Month” inspections as well as avionics installations on the Falcon 50, Falcon 2000 and Falcon 900 family of aircraft as well as the Falcon 7X and 8X. It has about $1.5 million in tooling, equipment and Falcon spares in addition to a hangar, shop and offices for employees and customers."