u/Aegehn

As per this announcement : https://forums.flightsimulator.com/t/aircraft-avionics-update-04-aau-04-release-information/764350/2

This is probably some kind of "make good" offer for the delays of most of the AAU4 aircrafts that should have been updated yesterday but were not. It is implied the offer is time-limited, but the time limit is not set.

There is even a trailer : https://www.youtube.com/watch?v=m9fjU5Y5ixU