ukaviation.aero
NATS report reveals one-millisecond software defect behind September air traffic chaos
A previously unknown software defect with an exposure window of just around one millisecond was responsible for the major National Airspace System failure that caused widespread disruption across UK aviation on 8 September, according to a preliminary investigation by NATS. The report, published on 16th of September, reveals how a highly specific sequence of events corrupted flight data within the NATS National Airspace System (NAS), eventually forcing London Area Control (LAC) to operate using fallback procedures and triggering severe restrictions on flights across the UK.