Several major European airports, including Brussels, Berlin Brandenburg, and London Heathrow, experienced significant disruptions on September 19, 2025, due to a cyber-related incident affecting airline check-in and boarding systems.
The disruption targeted Collins Aerospace’s MUSE software, which powers self-service systems used by airports and airlines worldwide. As a result, electronic check-in and baggage drop services were unavailable, forcing staff to revert to manual procedures.
Brussels Airport reported major flight delays. In a statement, the airport said, “Passengers are advised to check flight statuses as manual procedures are being implemented. We apologize for any inconvenience caused.” Berlin airport disconnected its systems from the network to mitigate the issue, while Heathrow described the disruption as a technical problem linked to its service provider, Collins Aerospace, a subsidiary of RTX Corp.
A spokesperson for Collins Aerospace said, “We are aware of the issue affecting some of our MUSE systems and are working around the clock to restore full service. Our teams are coordinating with airports to minimize disruptions.” Meanwhile, Paris airports including Roissy, Orly, and Le Bourget remained largely unaffected.
Travelers were advised to monitor their flights, and manual check-in procedures were in place to reduce delays.