Rolls-Royce's Trent 7000 has been certificated by the European Aviation Safety Agency.
The Trent 7000 is the sole powerplant available for the re-engined Airbus A330neo, of which there are two variants: the A330-900 and -800.
R-R says it was presented with the certificate at the Farnborough air show today, and that the first Trent 7000 production engines have arrived at Airbus's assembly line in Toulouse.
The A330-900 took off for its first flight in October 2017, and is set to enter service with launch operator TAP Portugal by the end of September.
R-R civil aerospace president Chris Cholerton states that Trent 7000 certification represents a "great milestone in a period of unprecedented activity for us".
The Trent 7000 combines architecture from the Boeing 787-powering Trent 1000 TEN with technology from the A350's Trent XWB.
Designed to produce up to 72,000lb of thrust, the Trent 7000 will deliver a "step change" in performance, says the UK manufacturer.
The new powerplant's bypass ratio will be twice as high as that of the Trent 700 – which powers in-service A330-200s and -300s – while specific fuel consumption will be cut 10% between the two generations, says R-R.
It adds that noise will be "significantly" reduced.