sentences:  in 1971.Using Aspen Airways as an aspirational model, the original aircraft were one four-passenger, normally aspirated twin engine Piper Aztec, two eight-passenger turbo-charged twin engine Cessna 402s, followed by the 1973 post ski season introduction of a 44-passenger Convair 440 twin radial engine airliner.The aircraft were operated out of Hollywood Burbank Airport in southern California (BUR).