Whitby argues that aviation's six-decade focus on preventing pilot error offers lessons for HCI and UX. After a shift in attitude toward error — long overdue in IT — evidence-based investigation, multi-cause analysis, and continuous incident data collection can reduce interface failures the way they made airline travel safer. Drawing on aviation categorisation and investigation techniques (including work from his Sussex paper on flying lessons for the human-computer interface), he shows how HCI still uses investigative frames aviation has outgrown.