Alaska Airlines has revealed that an "unexpected failure" of a critical piece of hardware caused an IT outage that led to its entire fleet being temporarily grounded on Sunday.

Alaska Airlines is rushing to fix a major disruption to its service after a hardware failure forced a ground stop of its planes for around three hours Sunday night.

The airline told Network World that when the critical piece of what it described as “third-party multi-redundant hardware” failed unexpectedly, “it impacted several of our key systems that enable us ...