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04/16/2013 02:08 pm ET

American Airlines Reservation System Outage

American Airlines tweeted a notice earlier today alerting customers that its booking and reservation tool was unavailable.

According to CNBC, the outage is interrupting passenger check-in and causing flights to be delayed across the country. United Airlines ran into a similar issue back in August, blaming the outage on a piece of hardware. United grounded planes across the country, affecting nearly 200 flights.

Check back for updates.

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