It IS a leading edge slat, but I dont want to get too specific about my job yet. All ill say is that I am an aircraft mechanic in Canada. The fluid visible on the wing is anti-ice fluid, because it was -30°C that day.
Close enough for me. Its a Bombardier (formally Canadair) Challenger 890. The private version of the CRJ 900. Cant seem to upload pics from this dang tablet, so you will have to google it. Off to you nuuumannn...