Meetings with European unions will begin this week with the first confirmation expected of the number of workers made redundant from its 135,000 employees.
British union sources expect to see details over the next two weeks on how it will affect operations at sites like Broughton in Flintshire and Filton near Bristol.
The assembly plant with 6,000 employees in North Wales is vulnerable to cuts in production of Airbus commercial aircraft – and 500 workers at Guidant have already been laid off.
“For the next two years – 2020/21 – we assume that production and deliveries will be 40% lower than initially planned,” Faury told Die Welt.
He said production – currently reduced by around 33 percent – would return to normal by 2025.
Faury did not comment on the specific restructuring plans, but said the company would make every effort to cut costs.
“It is a brutal fact, but we have to do it. This is the necessary adaptation to the massive drop in production. It’s about securing our future, “he added.
France has announced a 15 billion euro (£ 13.3 billion) aid plan for its aerospace industry, with the British government being asked to offer similar support to the sector in Britain.
Airbus supplier Magellan Aerospace told workers last week that 240 jobs were at risk at the Wrexham and Deeside sites.