Engine durability differences on Boeing 787 aircraft have produced markedly different maintenance demands for operators, with consequences for fleet availability, leasing decisions and the commercial balance between the two suppliers available for the type.
The General Electric GEnx-1B and Rolls-Royce Trent 1000 were offered for the 787 family to give airlines a choice of powerplant and reduce dependence on one supply chain. However, the two engine fleets have developed contrasting operating records. The report said that approximately 35% of active Dreamliners use Trent 1000 engines, compared with 65% powered by the GEnx.
Different maintenance burden
Early Trent 1000 engines experienced fatigue and corrosion affecting intermediate-pressure turbine blades. The later Trent 1000 TEN standard subsequently faced faster-than-expected wear on high-pressure turbine blades. Those issues led operators including Air New Zealand and British Airways to ground aircraft for inspections and unplanned overhauls.
Some airlines responded by leasing older aircraft with lower fuel efficiency to protect their schedules while affected 787s were unavailable. The report said Rolls-Royce’s expenditure on retrofits, customer compensation and modifications had exceeded $3 billion. A single unscheduled shop visit can cost more than $5 million when direct and indirect effects are included.
| Measure | GEnx-1B | Trent 1000 |
|---|---|---|
| Share of active Dreamliners | 65% | Roughly 35% |
| Aircraft ordered with the engine | 677 | 71 |
| Reported operating benchmark | Frequently more than 20,000 hours before a major shop visit | Early variants recorded substantially shorter time on wing |
Recent order data has also reflected the reliability gap. The figures cited in the report show 677 GEnx-powered aircraft ordered, against 71 aircraft equipped with the Trent 1000. Rolls-Royce engineering chief Simon Burr acknowledged that the company had lost market share because earlier versions of the engine were not durable enough.
“We lost market share because earlier engine versions were not durable enough,” Simon Burr said.
Rolls-Royce’s response
Rolls-Royce is responding with the Trent 1000 XE standard. The upgrade includes advanced thermal barrier coatings and redesigned turbine geometry, with the stated aim of extending the time on wing for aircraft using the TEN variants.
Following initial certification milestones in June 2025, the report said the upgraded standard was being rolled out across operators. Rolls-Royce chief executive Tufan Erginbilgic said targeted operators could achieve as much as six years between major shop visits.
For 787 operators, the issue extends beyond the cost of an engine overhaul. Unscheduled removals can require replacement aircraft, changes to maintenance planning and additional spare-engine capacity. The contrast between the two engine choices has therefore become a fleet-planning consideration, affecting both the economics of existing aircraft and the attractiveness of future orders.
- The Trent 1000’s earlier durability problems resulted in inspections, overhauls and aircraft groundings.
- The GEnx-1B has recorded longer intervals before major shop visits, according to the report.
- Rolls-Royce is using the Trent 1000 XE to target longer time on wing and recover competitiveness.
