Over 500 US flights canceled as global IT outage prompts ground stop

Over 500 US flights canceled as global IT outage prompts ground stop

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Air passengers around the world faced delays, cancellations and problems checking in as airports and airlines were caught up in a massive IT outage that also affected industries ranging from banks to media companies.

Several U.S. carriers, including American Airlines, United Airlines, and Delta Air Lines, issued ground stops for all their flights early on Friday due to communication problems, according to the Federal Aviation Administration.

There were over 500 flights canceled and more than 1,100 delays as of 6 a.m. ET, according to flight-tracking website FlightAware. According to aviation analytics company Cirium, the cancellations so far represent a little over 1.9% of scheduled flights, which the firm says is “significantly higher than usual at this point in the day.”

Around the world, airports and airlines advised customers to arrive earlier than normal for flights. Analysts said the outage was likely tied to a glitch in Microsoft software used globally.

Microsoft said users might be unable to access various Office 365 apps and services due to a “configuration change in a portion of our Azure-backed workloads.”

More on the outage: Global tech outage grounds flights, hits banks and media businesses

According to an alert sent by Crowdstrike to its clients and reviewed by Reuters, the company’s “Falcon Sensor” software is causing Microsoft Windows to crash and display a blue screen, known informally as the “Blue Screen of Death.”

The alert, sent at 1:30 a.m. ET on Friday, also shared a manual workaround to rectify the issue. A Crowdstrike spokesperson did not respond to emails or calls requesting comment.

The aviation sector is hit particularly hard due to its sensitivity to timings. Airlines rely on a closely coordinated schedule often run by air traffic control. Just one delay of a few minutes can throw off a flight schedule for take-offs and landings for an airport and airline for the rest of the day.

Some airlines said they were already back online, with Spanish carrier Iberia saying it had managed to avoid flight cancellations.

What happens if my flight is canceled?

Department of Transportation rules require all airlines to offer customers a refund if their flights are canceled for any reason, but customers may be entitled to additional compensation if a cancellation is within the airline’s control.

It is unclear whether an IT outage affecting all airlines would qualify within their control.

Controllable vs uncontrollable delays

The DOT draws a distinction between operational issues that are in an airline’s control versus those that aren’t. 

“A controllable flight cancellation or delay is essentially a delay or cancellation caused by the airline. Examples include: maintenance or crew problems; cabin cleaning; baggage loading; and fueling,” a DOT document says.

What should I do if my flight is delayed?

If your flight is experiencing a long delay, the Transportation Department suggests asking airline staff if they will pay for meals or a hotel room.

The DOT dashboard reflects airlines’ official policies, but many carriers handle compensation for delays on a case-by-case basis and may provide vouchers or other benefits in some situations that are not formally covered.

Contributing: Andrew Mills, Joanna Plucinska and Lisa Barrington; Reuters

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