Originally Posted by
gregster
It's possible they are referring to the AC878 2011 incident, but it would be inaccurate to say that it almost led to a mid-air collision.
Clearly it is. Mentioned in the article.
Since there was a TCAS warning and the co-pilot reacted the wrong way, until the captain reacted and corrected, there was a risk of a mid-air collision.
I'll stay out of the semantics issue whether "a risk of" is equivalent to "almost."
Then there is the issue of passengers not having their seat belt fastened when the sign was on. I am not sorry for them...