Air Traffic Control: Good Progress On Interim Replacement For Outage-plagued System, But Risks Can Be Further Reduced

During the last year, certain Air Traffic Control centers have experienced a series of major outages, some of which were caused by the Display Channel Complex (DCC) -- a mainframe computer system that processes radar & other data into displayable images on controllers' screens. This report determines: the portion of the outages experienced at the 5 DCC-equipped en route centers that were attributable to DCC; whether DCC was meeting its system availability requirement; & FAA's projections of future DCC outages & availability. Charts & tables.