Rolls-Royce said it had won a $9.2 billion order to supply engines for 50 A380 aircraft for Dubai's Emirates airline, providing a boost for the British company after a torrid year of profit warnings. Rolls-Royce said the order was the largest in its history, pushing its shares up 2.1 percent to 1001 pence in early trading, making it one of the biggest gainers on the FTSE 100 index. It is the first time the Gulf carrier has ordered Rolls-Royce engines for its superjumbo fleet, the rest of which is powered by Engine Alliance, a joint venture of General Electric and Pratt & Whitney. The companies said the aircraft in question would enter service from 2016. The contract includes a long-term "Totalcare" package, which means Rolls-Royce will also provide service and maintenance to Emirates for the Trent 900 engines. Rolls-Royce is the world's second-largest maker of aircraft engines after U.S. group General Electric, but cancelled orders in other parts of its business, where it makes power systems for use in the oil and gas, marine and industrial sectors have hit its outlook.