Kind of a big deal
I'm no expert. But my understanding is that in most cases, federal charges in federal court tends to be a bigger deal than are similar charges in State court.
In other words, this may be a case where the State has not done permit holders any favors. An inadvertent, unintentional, non-violent violation of the "No Guns through security checkpoint" law by a permit holder is now handled exclusively at the federal level, rather than likely being handled at the State level instead. Among other issues, should one draw a jail/prison sentence, the federal system provides much less flexibility in terms of parole; convicts serve a larger portion of the original sentence than they do in most State systems.
Obviously, the relatively recent (1970s) federal ban on private guns in the cabin of commercial aircraft is not only un-needed, but also counterproductive. However, so long as the federal ban remains, LACs who carry firearms are well advised to abide the law. We ought to also be well aware of where we are and not forget we have a gun.
However, violations of the airport secure area with prohibited items are treated very differently depending on what the item is. Guns are treated unduly harshly, IMO. Water bottles and other liquids are almost always just discarded with nary a thought of any charges. Violations with knives also, almost never draw any charges unless there is some evidence of deliberate attempt to violate the policy. The knife is either surrendered, or the owner is given the chance to go mail it to themselves.
But any violation with a gun results in automatic confiscation and at least a ticket/summons to appear, frequently a custodial arrest.
Charles