Delta identifies cause of computer crash that crippled flights Monday - The Washington Post

I'm guessing some extra AWS, Azure, and Google Cloud Platform architects and salespeople are spending time in Atlanta this week

"What happened, in fact, was that the Delta computers that control everything from reservations and boarding passes to crew and gate assignments toppled like a row of dominoes when one thing went wrong early Monday. 

A power control module malfunctioned, causing a surge that cut off power to the airline’s main computer network. When that happens, the system is designed to switch in the blink of an eye to backup computer systems. On Monday, however, some of the backups did not kick in.

“When this happened, critical systems and network equipment didn’t switch over to backups,” Delta Chief Operating Officer Gil West said in a statement. “Other systems did. And now we’re seeing instability in these systems.”"

Delta identifies cause of computer crash that crippled flights Monday - The Washington Post