On July 19, 2024, CrowdStrike released a sensor configuration update to Windows systems resulting in the largest IT outage in history with 8.5 million computers crashing. The impact on air traffic showed a 31% reduction in flights from 0800 to 0900. Delta, United, and American Airlines were significantly affected, while Southwest Airlines remained unscathed, as per an ABC News article. Delta Airlines suffered the most prolonged recovery period due to a lack of proper disaster recovery and IT business continuity plans. This incident highlighted the importance of preparedness in dealing with unexpected disruptions.
https://heavymeta.org/2024/07/28/crowdstrikes-impact-on-aviation.html