What wasn’t clear, according to Secretary Duffy, was the root cause of the problem. . A view of an information board at the Chicago O’Hare International Airport, filled with waiting passengers on November 13, 2026. ” The secretary said that this was “routine maintenance,” rather than the result of a major modernization effort. He told analysisers that it was “such an old wire that it was being discontinued, meaning that line was going to get shut down,” necessitating the upgrade.
Work to replace old copper wire led to the FAA’s ground stop.
