Asian Aerospace 2000 -- Zurich-based Jet Aviation has completed a far-reaching refurbishment of its Citation II executive twinjet, recently returning it to service alongside a Challenger 601 and seven US-located Gulfstreams. The eight-seat Citation now has new carpeting, reupholstered seats and replated metal surfaces, giving it an internal appearance to match its larger compatriots in the fleet. Avionics improvements include a ground-proximity warning system and expanded radio communications. The company has two Citation Bravos on order for delivery in the fourth quarter of this year and the second quarter of 2001.