The US aviation regulator has blamed a damaged database file for the failure of a critical flight safety system that prompted it to halt all domestic departures for two hours on Wednesday.
The Federal Aviation Administration ordered the rare shutdown of domestic air traffic after a failure of the so-called Notice to Air Missions system, which provides real-time information about potential hazards to pilots and crew members.
More than 1,300 flights to or from US airports had been cancelled and about 9,500 were delayed by 6:30pm eastern time, nearly 12 hours after the FAA ordered the halt, according to data from flight tracking website FlightAware.
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