Working up - or other similar status, means non-operational, basically. So until they are, you will get personal flights to test stuff etc. B flight it just showing who may be flying, not an actual flight as such. There are none.
Best to advance time to when you are operational.
I guess we could remove that but more code for quiet periods probably not worth it.
Don't skip time, use the Advance to next event button and try that.
It's possible that there is an historical attack, but your squadron is technically not operational - so you will be on your own. Think Leefe Robinson