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Reuters
Reuters
Business

Explainer-Why U.S. flights were grounded by a FAA system outage

Passengers wait for the resumption of flights at O'Hare International Airport after the Federal Aviation Administration (FAA) had ordered airlines to pause all domestic departures due to a system outage, in Chicago, Illinois, U.S., January 11, 2023. REUTERS/Jim Vondruska

The Federal Aviation Administration (FAA) allowed some flights to resume after an outage of the system that alerts pilots to any obstructions before take-off had earlier forced the civil aviation regulator to ground all aircraft in the United States.

Over 4,000 flights were delayed and more than 600 canceled because of the outage as of early Wednesday morning. U.S. flights were slowly beginning to resume departures as a ground stop was lifted.

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