Alcoa Howmet Castings, Darien, Conn., has been selected to supply an investment cast engine structural component for the Rolls-Royce Trent 900(r) engine program, the propulsion system for the Airbus A380 commercial aircraft. The agreement will cover the production of a high-pressure/intermediate-pressure bearing support structure component for approximately 250 engine sets. The component will be cast in IN718 alloy at the Howmet casting facility in Hampton, Va., where tooling already is in progress. Delivery of development casting is required in 2002 and production engine delivery is scheduled for 2004.