Alaska Airlines has grounded its planes following an IT outage.The carrier said it experienced the outage impacting its operations at around 8pm Pacific time on Sunday (4am Monday UK time). It did not specify the nature of the outage."We requested a temporary, system-wide ground stop for Alaska and Horizon Air flights until the issue is resolved," the Seattle-based airline said in a statement.Horizon Air is the regional subsidiary operating Alaska Airlines flights. Alaska Airlines apologised for the ground ...