Of the many commercial pilots I know, quite a few did carry sidearms with them up until the PSA flight incident in 1987.
Before 1987, flight crews were allowed to bypass security...and they did...saved time. As stated, some pilots carried sidearms, though they were violating various laws.
In 1987, a pilot from PSA was fired. He didn't turn in his ID right away (that was before all this electronic ID stuff), and he bought a ticket on a flight. Once on the flight at altitude, he went to the lavatory, then pulled out a .44 mag and shot the pilots then himself and the plane crashed killing everybody on board.
In classic knee-jerk fashion, the FAA mandated that all flight crews must clear security just like passengers. So the days of armed commercial pilots went away.
There is an obscure part that says that the owner of the aircraft can allow an armed person on board. Which is why a general aviation pilot could possibly carry. Also the airline, being the owner, could say OK to somebody to carry...but they don't except for federal LEO's and some rare cases local LEO's.
This is all up in the air as we speak, and when it comes down, we're looking at a "nothing sharp" policy for flying as well as some other policies that wouldn't have prevented yesterday's attacks. But the rocket scientists at the FAA are just running what they know...clamp down on the people that aren't causing the problem.
I think I'd prefer armed crew members.
On a side note, I can just see the headlines the next time some "air rage" person goes berzerk on a plane and fights with a crew member or something...the other passengers will probably beat the guy to death.
- Robbie