Flight Control

Most of the world’s Airbus A320 Family aircraft have returned to passenger service following rapid completion of critical software updates mandated by the European Union Aviation Safety Agency (EASA). The agency issued an Emergency Airworthiness Directive on November 28, 2025, requiring operators worldwide to address a vulnerability affecting specific flight-control computers before resuming normal operations. The directive targeted Elevator Aileron Computer (ELAC B L104) units installed on A320 Family aircraft, which Airbus identified as potentially vulnerable to data corruption when exposed to solar radiation. The manufacturer’s Alert Operators Transmission detailed two compliance pathways: uploading the updated L103+ software standard or physically replacing affected ELAC units with serviceable equipment.

Airbus has issued a significant safety advisory affecting operators of A320 Family aircraft worldwide, warning of potential flight-control data corruption linked to solar radiation exposure. The European aircraft manufacturer disclosed that intense solar activity may, in rare circumstances, corrupt data essential to flight-control functions, affecting a substantial portion of the global A320 fleet. The alert follows Airbus’s investigation into a recent operational event involving an A320 Family aircraft, during which solar activity was identified as a possible trigger for data corruption within the aircraft’s flight-control systems. Notably, the incident resulted in no loss of control or passenger injuries, but prompted comprehensive analysis and industry coordination.