UK aerostructures firm GKN Aerospace has secured the contract to manufacture winglets for the Bombardier CSeries twin-jet.
GKN will supply the winglets to the Bombardier plant in Belfast, Northern Ireland, from its composites facility on the Isle of Wight.
Bombardier's general manager for the Belfast plant, Michael Ryan, says the manufacturer is "on schedule" to produce the first CSeries wing in 2011.
The company adds that the winglet agreement, which runs to 2025, could eventually be worth more than $100 million.
GKN Aerospace's European aerostructures chief Phil Swash says the contract will "build on our experience in the hugely promising area of winglet design and manufacture".
Another UK company, Cytec Engineered Materials, is also to supply the CSeries programme with composite material for the wing as part of a broader agreement covering a number of Bombardier programmes.
Testing of a pre-production demonstrator wing, already assembled and currently being transferred to a specialised rig, is to begin within a few weeks.