Heathrow Terminal 5 Opens With Baggage System Collapse: 500 Flights Cancelled in First Week
What happened
Heathrow Terminal 5 opened after 19 years of development but its automated baggage system failed immediately. Over 28,000 bags were mishandled in the first week and approximately 500 flights were cancelled. British Airways lost £16 million in the first week alone and its share price fell.[1]
What went wrong
Staff were unable to log into the baggage system due to insufficient parking near the terminal — a non-technical problem that cascaded into system overload. The system had been tested in isolation but never with real staff, real bags, and real operational pressures simultaneously.[1]
Lesson learned
Integration testing must involve real operational conditions, not just technical components in isolation. Human factors — staff logistics, access, training under pressure — are as critical as software correctness. Opening with reduced capacity and scaling up is safer than a full-scale simultaneous launch.