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What we know about the longest US nationwide flight ground stop since 9/11

By · Published by Everything Blog

In short

The historic travel shutdown ended late Friday after legacy air traffic control equipment buckled under a massive surge of data. More than 8,500 flights faced delays and nearly 8,000 were entirely cancelled while technicians worked to restore the analogue telecommunications network. Major airlines have begun repositioning aircraft to resume scheduled routes, but delays are expected to drag through the weekend. Transportation Secretary Sean Duffy cited the failure as urgent evidence that the nation requires a comprehensive $50 billion system modernization.

Key points

  • Homeland Security Secretary Markwayne Mullin confirmed the outage was not caused by a cyb…: Homeland Security Secretary Markwayne Mullin confirmed the outage was not caused by a cyberattack or a Microsoft system failure.
  • Transportation Secretary Sean Duffy warned travelers that the operational ripple effect w…: Transportation Secretary Sean Duffy warned travelers that the operational ripple effect will persist across the network for several days.
  • Modernizing the nation's air traffic control infrastructure to prevent similar failures w…: Modernizing the nation's air traffic control infrastructure to prevent similar failures will require an estimated $50 billion investment.

Sources checked by our analysis pipeline: 1

- Published

The US Federal Aviation Administration has lifted the longest nationwide ground stop of flights since the 11 September 2001 terrorist attacks.

The FAA said Friday's stoppage, which lasted more than four hours, was "due to extraordinary circumstances" from a communication issue affecting all air traffic control centres.

Homeland Security Secretary Markwayne Mullin said there was no indication of an attack and that everybody was safe.

Here's what we know.

How many flights were affected?

The ground stop led to more than 8,500 delayed and nearly 8,000 cancelled flights on Friday, according to FlightAware.

The FAA's initial announcement at 15:54 EST (20:54 GMT) said all flights departing within the US would be grounded until further notice.

More than 3,500 airplanes were in the air at the time. Some were diverted to other airports and others flew on to their destinations.

Hours later, some flights were allowed to take off from San Francisco International airport.

The Federal Aviation Administration opened skies again at until 20:15 EST.

What about international flights?

All US-bound air traffic from Eurocontrol member states was suspended…

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