What does a censor have to do with flight numbers? I just randomly choose flight numbers (not trying to simulate some disaster) and sometimes they won’t enter. Like I was flying a United 777-300 and tried using 136 or something. It wouldn’t accept it, but I made it 953 and no problem…stupid if that’s by design; frustrating if it’s a bug. Just would love to know a list to avoid if it’s on purpose.