Note time reference in intro. The crash of the Cirrus SR 20 this afternoon is raising serious concerns for Duluth-based Cirrus Design in addition to a lengthy investigation by Federal authorities. Prospects were bright for Cirrus when its new single-engine airplane was approved by the FAA last year, and orders brisk for the single-engine, four-seater aircraft. But now the cause of the crash, and the consequences for the company, are unclear.