Question: What was an American regional airline called when it was founded in 1982, that company acquired a carrier operated a mixed fleet of Beechcraft 1900, Piper Navajo Chieftains, Beech 99 Airliners, and also occasionally utilized a Beech King Air 90 as a back-up aircraft?
Sentence (from "Air 500"): In the early nineties, the fleet continued to grow adding 2 more Mitsubishi MU2 aircraft, 2 Citation 500 business jets and 1 Citation 2 business jet.
Relevant evidence: No