Naske Air operated one mainly out of Hanover until its nasty CFIT crash in Greenland in 2001, which killed (among others) the boss and destroyed the aircraft and thus the company.
ASN Aircraft accident Dassault Falcon 20C D-CBNA Narsarsuaq
http://www.hcl.dk/graphics/synkron-l....d-cbnaEND.pdf
(Apparently not the aircraft's fault.)