“It’s not really the holster, it’s the TSA’s insistance on punching a hole in the holster for a padlock, and the hole is place so the padlock hasp fits behind the trigger.”
Is the padlock to prevent a weapon grab? If the pilots go through the same training as Air Marshals, surely they are versed in weapon retention. I think a level 3 holster would be much more practical and safer.
No. When the flight officer is on the flight deck, he removes the padlock and wears the weapon. If the flight officer leaves the flight deck for any reason, he must remove the weapon from his belt and padlock it before unlocking the cockpit door. He must also have the weapon padlocked when walking through the airport.
Here is another youtube with the same expert explaining the procedures. I hesitated to use this clip the first time because it is from the Communist News Network.