Originally Posted by
MechEngr
I expect they are to lift the door to disengage the fingers. If the door was unable to move up then the fingers cannot release.
Yes, and that's an entirely necessary function when an actual emergency door is fitted.
The door plug, on the other hand, is only ever going to be removed in the hangar, during a check, and it's going to have to be lifted out anyway once it's cleared the stops, so the value of the springs, if fitted, would be minimal.