Textron Inc. (TXT) recently announced that a handful of upgraded aircraft from its Cessna fleet of jets have entered into service following their first delivery.  These aircraft are the Cessna Skyhawk, Cessna Skylane, Turbo Skylane and Turbo Stationair.  These should enhance TXT’s position in the expanding commercial aircraft market.With this latest upgrade, Textron aims at offering its commercial customers a fleet of jets that have a modern and appealing tone like that of the newest Cessna Citation jets wh ...