WASHINGTON, July 8 (UPI) -- United Airlines resumed flying Wednesday morning following a computer glitch that grounded thousands of planes nationwide.
The Federal Aviation Administration lifted the ground stop after an "automation issue" caused problems. About 10 a.m. the FAA said the issue was fixed. About 3,500 planes were affected for 235 domestic and 138 international destinations.
Earlier, some reports say the computerized check-in system crashed and passengers were receiving handwritten tickets. The company has not posted details, but a similar incident occurred June 2.
The carrier transports some 16 million passengers a day.
@doublerpub We're working to resolve the issue with the passenger service system and apologize for the inconvenience. ^JJ— United (@united) July 8, 2015
Frustrated passengers took to Twitter.