PORTLAND, Ore. (KOIN) -- Alaska Airlines grounded all flights in the U.S. early Wednesday morning, according to the air carrier.
The aircrafts "experienced an issue while performing an upgrade to the system that calculates our weight and balance," Alaska Airlines officials said in a statement to KOIN 6 News.
"Out of an abundance of caution, we requested a ground stop for all Alaska and Horizon flights, which was instituted at approximately 7:30am PT. The issue was mitigated...