Originally Posted by
billinaz
I also have a commercial pilot license.... Background check for that was not done.
All holders of pilot's licenses were screened against the watch list (and other lists, too, IIRC). That's not a full background check, but is more of a background check than the general population.
If you fly charter or freight aircraft subject to the 12-5 rules, or into DCA, you most likely had a detailed background check. If you're cleared to fly into one of the DC-3 airports (VKX, W32, CGS), there was a background check that exceeds a SIDA background check. And, of course, pilots operating aircraft under Part 121 have a pretty detailed check.
From your comments, it doesn't sound like you had a check you knew about. But the FAA pilot records were/are screened against the TSA lists.