Airbus grounded over 6,000 of its widely used jets for an urgent software update after one suddenly lost altitude mid-flight — a decision that could throw the global holiday travel season into chaos.

The aerospace giant said Friday its A320 fleet will be kept off the runway after uncovering a software flaw that could leave pilots unable to steer during solar storms — and urged all worldwide airlines using the jet to immediately update their systems to guard against radiation interference.

About 3,000 A320s were airborne when the grounding was announced.

The A320 fleet is grounded after Airbus discovered a software flaw that could leave pilots unable to steer during solar storms. NurPhoto via Getty Images

“Analysis of a recent event involving an A320 Family aircraft has revealed that i

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