I don't think I have ever gotten one of those missions since I met all the requirements including POI's
i get them sporadically as well as a few others that show up that have a weird response compliment. One I can think of is the Cargo Plane fire. The requirement is for 6 or more ARFF trucks... Even the largest airports don't have 6 ARFF trucks.....at least I have never seen it. I think Washington Dulles and Washington National may have 4 each.... No big deal... just an observation