What OBG said. The only way to have an AD is to be handling the weapon, and evidently it occurred while landing! hehehe
I fly alot and I fly armed. Whenever we board the plane, we have to peek in and say hi to the pilots. The cockpit door is always open and most of those guys are pretty squared away. Not all are armed, I don;t think (I don;t the airlines policy), but the ones that are are pretty gung ho. They LOVE having the authority to carry a firearm. And for me, personally, I like that.
I'll usually say "Hey, I'm in 21F. What are you guys carrying?" and in most cases their eyes start to sparkle and they're happy to say "I'm carrying a Glock and he's got a Sig P229!!!" (big smile on both faces) "What about you?". Next thing I know, we're holding up the guys behind me that are trying to get on.
Hey, AD's happen to experienced policemen across the nation. Whether it's in a locker room or at 20K feet, a bullet without a purposeful destination is a dangerous thing! They don;t happen often to pilots or (we'd) be hearing about it. The TSA is part of our agency and, believe me, if AD's were anywhere near common on airplanes, there would be paper flying everywhere!
It's kind of funny in a way