UN: "UN... declaring an emergency, we have had an engine failure, returning to the field."
Juba tower: "UN... roger cleared to return to the field"
minutes pass...
Juba tower: "UN... keep your speed up I have alot of traffic!"
A few more of my favs,
"Call again short, short final"
"Call again on ground, have a nice time"
and a fav for the "northerners"
"stttaaaccccion CCCHHAAAling KKKharrrrtoum, say again!"