Originally Posted by
Flying Wild
There’s a lot of information we don’t know. When was it de-iced. What was the fluid mix. What was the holdover time. In heavy precipitation the wing could well have snow on post de-icing but still be protected. I doubt they would have departed in those conditions without having considered winter SOPs.
uh, no. When the anti-icing film is compromised by accumulation of snow its time to get another spray job. That’s what you are actually looking for in a pre-takeoff inspection.