British company Rolls-Royce said on Wednesday it had won a contract to supply and maintain Trent engines for Singapore Airlines\' Airbus planes worth $1 billion (694 million euros). \"Rolls-Royce, the global power systems company, has won a $1 billion order from Singapore Airlines to supply Trent 700 engines to power 15 Airbus A330 aircraft, along with TotalCare services support,\" a statement said.