> What caused it to fail? Nats says that the failure was triggered by a single piece of data in a flight plan that was wrongly input to its system by an unnamed

> What caused it to fail? Nats says that the failure was triggered by a single piece of data in a flight plan that was wrongly input to its system by an unnamed airline. Classic failure of input validation. I’m curious though, has there been more costly fat-finger error than this before?