A faulty router grounded flights across the United States yesterday, causing the longest shutdown since 9/11.
The outage occurred during routine maintenance performed by contractor L3Harris as it transitioned from copper to fiber optic lines. A router being replaced allegedly flooded the air traffic control network with connection attempts, forcing a four-hour shutdown.
The FAA does not believe a cyberattack was involved, and the investigation continues. L3Harris is cooperating with the agency's review.