Rolls-Royce has unveiled plans to develop an Enhanced Performance upgraded version of the Airbus A350-900’s Trent XWB-84 engine, with Singapore Airlines as launch customer.

The improvement package is expected to yield a 1% improvement in fuel burn, and will be delivered to Singapore in the fourth quarter of 2019. The Trent XWB-84EP will incorporate turbine cooling and aerodynamics improvements developed specifically for the XWB-97 engine now in development for the A350-1000, as well as from the next-generation Advance technology program.

The “EP” also includes an improved secondary air system and inter-stage sealing system from the XWB-97, as well as upgrades to the Trent XWB-84 turbine tip clearance control system that Rolls says are “based on recent improvements on other programs.” The engine maker adds that the upgrade will be available to other A350-900 operators following initial deliveries to Singapore.

Rolls is meanwhile poised to deliver the 100th Trent XWB engine, which will enter service on the fourth Singapore Airlines A350-900. The company adds that the delivery marks another milestone in the ongoing transition to a higher-tempo production flow at its Derby, UK, site, from where, next year, new XWBs will be made every working day.