CHICAGO -- United Airlines said a piece of computer hardware caused the technology meltdown that delayed 580 flights and shut down its Web site for more than two hours Tuesday.
The outage kept workers from boarding passengers on time. Passengers reported long lines at hubs in Newark, San Francisco, Houston, and Chicago. Nine flights were canceled.
A piece of hardware in a data center failed to communicate with other computer equipment, a United Continental Holdings Inc. spokesman said. A backup system failed to take over for the troubled hardware.