United Airlines experienced a significant technical issue on Wednesday, August 6 that led to widespread delays and ground stops across the United States. The issue, which was related to a system called Unimatic, was resolved, but delays had ongoing ripple effects as the airline worked to restore normal operations.
United said the Unimatic system, which handles key flight information, caused the problems. Flights were grounded at major hubs like Chicago, Houston, Denver, Newark, and San Francisco. Many passengers experienced delays on the tarmac and at gates.
More than 1,000 United Airlines flights were delayed in the U. S. due to the problem. The system outage, as the company described it, lasted several hours according to a statement sent out by United. “Safety is our top priority, and we’ll work with our customers to get them to their destinations,” an emailed statement from the Chicago based-airline said.
The Unimatic system is a legacy mainframe system that stores flight information and distributes it to other systems. This information is crucial for calculating weight and balance of aircraft and tracking flight times, ensuring safe operation. This crucial information about each flight is then fed to other systems.
The airline said it is treating the matter as a “controllable delay,” which means the airline paid for customer expenses such as hotels or meals where applicable.