I like this script very much, but recently found a problem. I think it should save each airlock state when the world is saved. Right now it does some kind of refresh when game is loaded.
I have a planetary station where ship lands on a piston based elevator, and the elevator shaft is the airlock itself. When it's depressurized the elevator is in extended position and the patform occupies the same space where the outer door would be if closed. At the mentioned refresh the scipt closes the outer door causing collisions and totally ruining the elevator.