U.S. air-traffic disruption entered a third day on Sunday, affecting more than
5,200 flights. FlightAware reported over 1,600 cancellations and roughly 3,600
delays nationwide on Sunday. Transport Secretary Duffy said operations began to
be restored on Sunday but full recovery may not occur until Monday. Duffy said a
router replacement at an FAA facility in El Dorado, Arkansas triggered faults in
a recently replaced router in Amarillo, Texas, which began broadcasting large
volumes of data and overloaded other center routers. The FAA said it has
disabled the problematic router’s functions and applied the same measures to
about 60 similar routers; Duffy said the ultimate root cause remains unclear and
noted the routers were procured in 2001 and were already obsolete by 2006.
