It's been awhile since I worked flight line, at one time our SIDA badges would let us bypass security all together. But then came 911 and that all came to an end, when I decided to wash my hands of all the bunk, they had us do the whole shoe thing, X ray the tool box, no knives, etc.. We eventual evolved by finding holes through there security but it was very time consuming and not worth it in the long run. I don't know what they are doing now but I would guess it would be the same as flying. Also we couldn't have any firearms on the property in our cars or anything. That's why a lot of A+P license mechanics bailed out of the industry do to the TSA bull and airline job uncertainty.