Walkaround

Engines · Rolls-Royce

Trent XWB

Trent XWB-84, Trent XWB-84 EP, Trent XWB-97

in production 2 min read · updated 11 October 2026 · checked 11 October 2026

Turbofan model under test
An ultra high bypass ratio turbofan model in a NASA wind tunnel. Credit NASA.

At a glance

Engine card

VariantsTrent XWB-84, Trent XWB-84 EP, Trent XWB-97
ArchitectureThree shaft turbofan
Thrust84,200 to 97,000 lbf
ApplicationsA350-900, A350-1000, A350F
Built byRolls-Royce
StatusIn production

Program and production

The Trent XWB is the engine that proved Rolls-Royce could still do this well. After the Trent 1000 damaged the company badly, the XWB delivered strong time on wing from early in its service life and became a substantial cash contributor rather than a liability.

The Enhanced Performance variant of the XWB-84 was certified with a 1 percent fuel burn saving and a 2 dB noise reduction against the standard engine, and entered service in May 2025 as part of a one billion pound investment in the modern Trent fleet.

It has beaten its own numbers. In June 2026 Rolls-Royce reported that data from the first 34 engines in service across three major operators showed a 1.8 percent reduction in fuel consumption, almost double the baseline target. The company puts that at around 450,000 dollars per aircraft per year, or roughly 9 million dollars annually for a fleet of 20 A350-900s.

The XWB-97 is the higher thrust variant for the A350-1000 and will also power the A350F, which is targeting first flight and a 2027 certification.

Technical and maintenance

In plain terms

Enhanced Performance is not a new engine. It is a package of refinements to an existing design, mostly in aerodynamics and sealing, that recovers efficiency without changing the engine's architecture or its maintenance programme. That is why it can go into production and into service without a long certification campaign.

On the line

The XWB-97 runs hotter and works harder than the XWB-84, and its durability behaviour deserves separate tracking. It is not a Trent 1000 situation, but the two variants should not be treated as interchangeable in planning terms. Record time on wing by variant rather than across the A350 fleet as a whole, particularly if you operate both the -900 and the -1000.

The broader Trent durability programme applies here too. Rolls-Royce reports a 100 percent improvement in time on wing across the Trent fleet since the programme began, and lifted its improvement target in February 2026.

Applications and fleet

The Trent XWB is the sole engine on the A350. There is no competing option, which removes engine selection from the A350 sales conversation entirely and makes Rolls-Royce's performance on this programme directly consequential for Airbus.

Delta ordered 30 Trent XWB-84 EP engines in January 2026 alongside 32 Trent 7000s, supporting continued A350 fleet growth. With the 777X delayed into 2027 and beyond, the A350-1000 is the only certified aircraft in its size class currently delivering, which keeps XWB demand strong.

Safety

No significant developments since 11 October 2026.

No Airworthiness Directive of fleet wide significance was issued against the family in this period.

Sources