Rgr, sorry i misunderstood your lines than..
You maybe have by accident mark the "retard" sound off in the PMsound module?
I am also building a airbus and i am just try to think here if i even hear that one because that is a boeing msg and i am not sure if airbus also use it... but i could be wrong i havent put my pmsounds back yet on my new setup here but i will test it as well and if i have it here i will let you know..
Other option could be the plane ( software ) you use for flying? maybe it could be in there?
gr.
Frans M