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Pursuant to a congressional request, GAO reviewed the reliability of the equipment at two Kansas City area air traffic control (ATC) facilities and the Federal Aviation Administration's (FAA) ability to safely direct air traffic in this area, focusing on: (1) the impact the equipment's outages had on the safety of the ATC system and on airline operations; (2) identifying procedures to help ensure aviation safety during equipment outages; (3) the extent to which the equipment at the Kansas City facilities has met FAA's availability requirements; (4) comparing the outage rates of equipment at those facilities to the rates at other facilities; and (5) the actions FAA is taking to address equipment outages.

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