Rolls-Royce and Lufthansa Technik AG are to explore closer co-operation in the technical care of mature engines. It follows a year-long pilot project intended to reduce the maintenance costs of mature Trent 500 engines which power the Airbus A340-500/600 aircraft. Rolls-Royce’s expertise as the engine manufacturer and Lufthansa Technik’s experience as one of the world’s largest engine maintenance providers were combined in a pilot project. The question the pilot project pursued was: How can Trent 500 maintenance costs be reduced through the mature phase of the life-cycle? This work plays a significant element of ensuring Rolls-Royce has the capabilities to introduce TotalCare Flex, a concept to address the service needs of customers with mature-phase engines, including the Trent 500. Joint efforts on several Trent 500 engines made it clear that tangible reductions in costs were achievable through systematic changes in workscope, improved use of used material, and optimized processes in the workshops. Encouraged by the successful pilot project and great interest on the side of customers, the two project partners have agreed to explore options for longer-term cooperation, which may expand to include other engine types.