United briefly grounds all US, Canada flights for second time in 2 months

Core Points - United Airlines resumed operations after a brief ground stop due to a technological issue that lasted for one hour [1][2] - This incident marks the second time in two months that United Airlines has temporarily grounded all of its mainline flights [1] - The previous outage in August caused widespread delays across major U.S. airports, including Newark, Denver, Houston, and Chicago, but was resolved within a few hours [5] Company Operations - A connectivity issue occurred just before midnight Central time on Tuesday, leading to the ground stop [2] - The Federal Aviation Administration (FAA) was involved in pausing departures at U.S. and Canadian airports during the ground stop [1][8] - Ground stops are initiated with little to no warning and can be specific to airports, airspace, or equipment [8]