Rolls-Royce Trent 800
The Rolls-Royce Trent 800 is a high-bypass, three-shaft turbofan engine built by Rolls-Royce for the first-generation Boeing 777s (the 777 Classics). It was launched in 1991, first ran in 1993, received EASA certification in January 1995, and entered service in 1996. It secured about 40% of the engine market for the 777, competing with the PW4000 and GE90, and the last Trent 800-powered 777 was delivered in 2010.
The Trent 800 uses a three-shaft design with a 110-inch (280 cm) fan. It has a bypass ratio of 6.4:1 and an overall pressure ratio up to 40.7:1, delivering up to 413.4 kN (92,900 lbf) of thrust. It was developed from the Trent 700 and later led to developments in the Trent 500 program.
Major operators included Thai Airways, Singapore Airlines, American Airlines, Delta Air Lines, and British Airways, among others. The engine was lighter than its rivals, offering weight advantages over the GE90 and PW4000.
Production ran from 1993 to 2010. The Trent 800 faced notable reliability incidents in 2008 when fuel-oil heat exchanger ice caused power loss on landing approaches (BA 777 and Delta 777 incidents). Investigations linked ice clogging the inlet side of the fuel-oil heat exchanger, leading to airworthiness directives and a modification that replaced a multi-tube face plate with a flat design to prevent recurrence.
Rolls-Royce later offered the Trent 800EP, introduced by 2014, incorporating technology from newer Trent engines to deliver a small fuel-burn improvement.
This page was last edited on 2 February 2026, at 14:33 (CET).