London— British aero-engine maker Rolls-Royce is set to report a full-year loss of about £4bn on Tuesday, the biggest in its history, reflecting a fine for bribery and the collapse in the pound. Rolls-Royce has faced challenges across its business in recent years, weighing on its revenue and profit. That has prompting CE Warren East, who took the job in 2015, to restructure the company to respond to changes in civil aviation and other sectors. Pretax profit at the closely watched underlying level, which excludes adjustments in its currency hedging position, is expected to halve to £687m, according to a company-supplied consensus. The group has been hit by a slowdown in high-margin aircraft engine servicing, in part caused by reduced use of older aircraft, and lower sales of its Trent 700 engine that powers the Airbus A330, which is being superseded by the A330neo. A need to replace turbine blades on some of its Trent 1000 engines has also increased costs, and it is battling tough ma...

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