"I don't believe that the supply chain environment will get easier," Christian Bruch told analysts on a conference call, adding that it is "even more important to push for operational excellence everywhere as fast as possible".

Regarding the turbine unit's struggling onshore business, Bruch said, "There is no reason why you cannot be successful in onshore business if you fix your operational issues."

(Reporting by Isla Binnie; Editing by Kim Coghill)