Hi,
yesterday I flew with an A330-200/300 Aircraft, sitting next to the wings. As I saw during taxiing to the runway, the whole wing was covered with ice and snow (it was snowing quite strong). So I expected that the crew will go for de-icing before we fly. But the aircraft took off without having done any treatment. As we flew I saw that the major part of the wing was getting slowly clean, but still a huge amount of frozen ice was spread over the wing.
So my question: Is it not necessary to deice the plane before flying when you expect that the wing gets cleaner in flight?
Thanks for the reply