Airbus LEIA Project Advances Hybrid-Electric Integration

Airbus has initiated the next phase of its hybrid-electric aircraft development, transferring validated powertrain subsystems from laboratory testing in the United States to its dedicated integration facility in Germany.

Announced on July 22, 2026, at the Farnborough International Airshow, the Large Scale Integration Demonstrator of Hybrid Electrical Architecture (LEIA) project represents a €35 million ($41 million) investment. The program is designed to bridge the gap between component-level innovation and aircraft-level maturity for high-voltage generation and distribution systems on future short-to-medium range Commercial-Aircraft.

Subsystem validation at The Grid

The LEIA project builds directly on the Sustainable Water-Injecting Turbofan Comprising Hybrid-Electrics (SWITCH) program, which launched in January 2023. During July 2026, a core group of partners including Collins Aerospace, Pratt & Whitney, GKN Aerospace, and MTU Aero Engines concluded integrated laboratory testing of hybrid-electric powertrain subsystems.

This testing phase was conducted at The Grid, an advanced electric power systems laboratory operated by Collins Aerospace in Rockford, Illinois. The facility evaluated the performance of the subsystems under simulated flight conditions to validate their readiness for broader integration.

“This is the largest integrated systems test conducted at The Grid since its opening in 2023. By combining our technology expertise with deep industry collaboration, we are demonstrating how hybrid-electric systems can significantly reduce fuel consumption for next-generation aircraft,” said Kristin Smith, Vice President of Electric Power Systems at Collins Aerospace.

Transition to the STEP laboratory

Following the successful tests in Illinois, the validated hardware is being transferred to the Airbus Sustainable Technology and Engineering Projects (STEP) laboratory in Ottobrunn, Germany. The LEIA program, which officially commenced in December 2025, will now focus on aircraft-level integration.

At the STEP facility, Airbus engineers will concentrate on structural design, battery interfacing, and global energy-management systems. The primary objective is to prepare these high-voltage architectures for future regulatory certification. The consortium aims to conduct a comprehensive ground demonstration of the integrated LEIA systems in 2027.

According to reporting by GBP Aerospace & Defence, the LEIA consortium includes 25 aerospace companies and research organizations. Alongside the core engine and systems partners, the group features AVL, Fraunhofer-Gesellschaft, Liebherr Aerospace, Lynxeo, Safran, and SAFT.

“By moving to integrated, intelligent hybrid-electric architectures, we are actively laying the physical and digital foundation for the next generation of aircraft. This evolution demonstrates that the future of aviation is about more than just new power sources; it is also about the new ecosystems that will manage them,” said Karim Mokaddem, Head of Aircraft of Tomorrow Research and Technology at Airbus.

AirPro News analysis

The transition from the SWITCH project to the LEIA demonstrator marks a critical maturation point for hybrid-electric commercial aviation. While developing individual high-voltage components is a significant engineering challenge, integrating those systems into a cohesive aircraft architecture introduces complex thermal management, structural weight, and certification hurdles. By moving testing to the STEP laboratory, Airbus is shifting the focus from whether the individual components work to whether they can be safely and efficiently certified on a commercial airframe. We view the collaboration between major propulsion original equipment OEMs like Pratt & Whitney and MTU Aero Engines, alongside systems integrators like Collins Aerospace, as a strong indicator that the industry is aligning on hybrid-electric non-propulsive energy architectures for the eventual replacement cycle of current narrowbody aircraft.

Sources: Airbus