American Airlines said its reservation system had an outage on Tuesday, leading to a system wide delay that grounded the carrier’s fleet and halted its flights at least through late in the afternoon, Reuters reports.
The company said it grounded flights until 4 p.m. CDT (1700 EDT) as it tries to resolve the problem. American, a unit of AMR Corp, operates more than 3,500 daily flights worldwide.
The move affects potentially hundreds of flights across the United States. It was not immediately clear when the problem would be resolved.
