Power systems giant Rolls-Royce has signed a $99.9m MissionCare contract with the US Navy to provide support for the F405 (Adour) engines that power its T-45 training aircraft."This exercises the third year of the contract to provide guaranteed engine availability, which includes support ranging from on-wing through intermediate and depot level maintenance, under the base contract signed in 2008," Rolls Royce explained in a company statement.The total value of the contract is $476.91m over a five-year term. "MissionCare is used within the Rolls-Royce Defence sector to apply commercial Power By The Hour principles to the unique requirements of the defence industry," the power systems firm added.Patricia O'Connell, Rolls Royce customer business defence president, said its mission is to prepare student aviators for jet carrier aviation and tactical strike missions."We look forward to another successful year of providing the best engine readiness and availability," she said.Under the agreement Rolls-Royce will provide all maintenance, support, troubleshooting, parts supply and logistics for both the F405 engine and the aircraft gas turbine starting system.The contract provides comprehensive propulsion services to more than 200 aircraft, operating at four main Naval Air Stations across the US. Work is expected to be completed in September 2012.---cj