Hello,The little black rectangle next to the lower DU switch (73NG) indicates that it is inoperative.Is there a way to get them to work or I missing something here ?http://forums.avsim.net/user_files/153612.gifHappy flying.H.http://forums.avsim.net/user_files/153613.jpg

Ms/Mr H,Please sign your posts with your real name as per the forum rules, thank you.The panel switching switches are not operational on the NG. On the 744 however they are operational.Hope it helps,

Thanks for the answer.Happy Flying.Hans Havel. http://forums.avsim.net/user_files/153618.gifNew Zealand. http://forums.avsim.net/user_files/153614.jpg