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By Jeffrey Dastin / Reuters
Updated: January 14, 2016 3:14 PM ET
Travelers wait in line at Jet Blue's terminal 5 at JFK airport in New York, U.S., on Friday, August 07, 2015.  Photographer:  Michael Nagle/Bloomberg
Michael Nagle—© 2015 Bloomberg Finance LP

JetBlue Airways said it has restored online booking and check-in after a power outage shut its main website for about 2 hours on Thursday, raising concern about delayed flights.

A maintenance operation disrupted power at a data center run by JetBlue’s business partner Verizon Communications, the airline said in a statement, adding that this was not a “cyber security issue.”

Verizon has since restored power at the center, and JetBlue’s website is up for booking and check-in, the New York-based airline said in a blog post at 2:30 PM ET.

However, JetBlue said it was “still experiencing system issues” because of the outage.

JetBlue had 36 flight delays and four cancellations as of 3:00 p.m. EST, according to flight tracking website

The technical issue follows several high-profile computer problems that U.S. airlines experienced in 2015, including a router error at United Continental Holdings Inc and a malfunctioning iPad application used by pilots at American Airlines Group.

Industry consultants say computer disruptions will have a growing impact on airlines, and their passengers, as they automate more operations, outfit their planes with Wi-Fi and distribute boarding passes on smartphones.