Well done to all concerned.
I was sitting in an Transaero B737 in Moscow one wintery day.
I saw some ice on the wings, raised mu concerns to the flight attendant. She informed the pilots who ignored me. Fortunately, as I am here today, nothing untoward happened.
I did file a report but it was ignored.
The big lesson there was to never accept a non-European airline for crew travel in winter again.