Rolls-Royce said on Friday that it intends to retain a long-term relationship with the business across its civil aerospace and defence programmes. READ: Rolls-Royce to meet full year targets as it cost of fixing Trent 1000 engine within budget It said the indication of interest from Indra Sistemas was subject to a number of conditions and there is no certainty that this will result in a transaction. The announcement comes as Rolls-Royce gets to work on fixing its Trent 1000 engines, which powers Boeing 's 787 Dreamliner, after turbine blades corroded faster than expected and led to the grounding of several aircraft.