British engine maker Rolls-Royce slumped into a record $5.8bn annual net loss in 2016, ravaged by a Brexit-fuelled collapse in the pound and a corruption fine.
The loss after tax contrasted with a slender profit of $105m in 2015, the company said in a results statement.
Rolls took a vast hit from the drop in the value of the pound in the wake of Britain's shock EU exit referendum, alongside a $836m penalty to settle bribery allegations.
The London-listed company, whose engines are used in Airbus and Boeing aircraft, added that underlying pre-tax profits almost halved to $1bn.
Rolls-Royce, which also makes power systems for use on land and at sea, stated it was on track with efforts to slash costs and expected a "modest" performance improvement in 2017.
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"2016 has been an important year as we accelerated the transformation of Rolls-Royce," said chief executive Warren East, who has overseen a radical restructuring.
"We have made operational progress and performed ahead of our expectations for the year as a whole.
"At the same time, we have delivered major changes to our management and processes and, while we have made good progress in our cost-cutting and efficiency programmes, more needs to be done to ensure we drive sustainable margin improvements within the business."
The huge annual loss also follows a tough past few years for Rolls, which faced a string of profit warnings on the back of weak demand in its aerospace and marine markets.
The company was fined $768m in January to settle bribery and corruption claims probed by Britain's Serious Fraud Office and authorities in Brazil and the United States.
Rolls will pay the penalty over five years but has taken the full cost as an impairment charge against its 2016 profits.
The British pound has meanwhile fallen by almost a fifth against the dollar since the Brexit referendum that was held last June.
The slide is pushing up the costs of imported goods, sending British annual inflation to the highest levels in 2.5 years.
Official data Tuesday showed 12-month consumer price inflation rising to 1.8 percent in January - the highest level since June 2014.
"Surging inflation, in particularly food and fuel prices, are eating into disposable incomes and, in turn, that is starting to hit spending," said ING bank economist James Smith.
"We expect to see further evidence of this in this week's retail sales data."
Looking ahead for Rolls, East told reporters that 2017 would be "challenging" for the embattled group.
"We have to look after the short-term or there won't be a long-term."
Source: News agencies