For the second time in less than six weeks, United Airlines grounded all U.S. departures due to a computer fault.

The ban lasted approximately two hours and was lifted at 10:20 a.m. ET. A similar situation arose in early June when the airline cited a lack of “proper dispatch information” as the reason planes were delayed from taking off for less than an hour.

NBC's Jeff Rossen tweeted “@united agents now writing baggage tickets by hand. Supervisor tells me 'unclear' when system will be back up.”

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