The FAA’s Aurora radar centre will be fully restored by October 13 following an arson attack on September 26, according to administrator Michael Huerta.
The control tower covers both Chicago O’Hare and Midway airports.
“O’Hare arrivals and departures were running at more than 85 per cent of the two-month average for a Friday, and Midway operations were just above 90 per cent of the two-month Friday average,” confirmed the FAA.
The regulator has made telecommunications improvements between the Chicago TRACON and surrounding high-altitude air traffic centres to enable controllers to manage flights more efficiently.
A former contract employee, Brian Howard, is being held in custody on suspicion that he cut wires and set fire to the control tower because he was unhappy with working conditions.