Middle Eastern carrier Emirates has agreed a long-term maintenance contract with Rolls-Royce to support the engines on its Airbus A350 fleet.
Emirates' agreement covers 70 A350s, an aircraft which is currently available only with Rolls-Royce Trent XWB powerplants.
Rolls-Royce values the contract, for its TotalCare programme, at $2.2 billion.
It will bring 128 aircraft - either in the fleet or on order - into the TotalCare portfolio for the Dubai-based airline.
Emirates Airline president Tim Clark says the pact will help ensure life-cycle costs for the engines are "managed effectively and maintained to the highest standards".