>Is this week the missing 15-19?
very well could be
>3 yr [Delta]
First thing that came into my mind when I saw today's twat was that photo is very similar to one that Q posted long-ago.
We were advised NOT to use seconds.
The problem with icing might be due to the get-er-done mindset which ignored the possibility of ice being a problem. Or maybe they considered it, and de-icing by helicopter is the most economical solution. Or maybe it's a freak occurrence that wasn't worth worrying about, until it was.
https://pergelator.blogspot.com/2019/03/whirligigs.html