Originally Posted by
syntraveller89
This was the point I wanted to make about the expectation that a plane operating our of CDG at certain times of the year is (as part of normal operation) required to be de-iced and any airline would need to have procedures in place so that the de-icing process does not cause delays to the scheduled departure. Now if a sudden blizzard happened in the summer this same expectation would not exists, thus extraordinary.
It seems you are maybe right. Apparently a court in Germany ruled that an airline cannot claim lack of de-icing agent or significant de-icing process time as "extraordinary circumstances."
https://www.flightright.co.uk/your-rights/bad-weather