Not the first time Mr. Cawthorn pulled that stunt. He had been caught by the TSA with a Glock 9 mm in his carry-on trying to get on a flight in Asheville in July of 2021. That gun was unloaded at the time, but his bag did contain a loaded magazine. The Glock was confiscated but was later returned to Cawthorn.
Appears that $15,000 might be the maximum possible fine for this second infraction.