@Walnut, there was a post earlier of the computer screen with the ACARS messages.
http://www.pprune.org/rumours-news/5...ml#post9383206 One of the columns had a Priority level. Some of these messages were low & some higher. Also they were over several minutes.
One thing I did notice was another column -> Occurrence History
The "Smoke Lavatory Smoke" Message had occurred before... since the 18th May 2016 @ 21:09.... The date & time start is set at top of picture.
EDIT: Looks like it was the same flight....this ACARS report shows only from engine start.
What does each block indicate in the occurrence history, I assume some sort of time period or engine start?