I've found this same condition in AW hubs I've serviced. I think it may just be dried up oil or maybe too heavy of an oil that gums up the pawls so they don't engage. A note about my experience with pawl springs. They are an "R" shape with a foot that bends either up or down. If the foot is bent up, (or is it down, I forget) it forces you to mount the spring under the pawl which is much harder to do than if it's on top where you can see it through the hole as you slide the pin in place. I found it easier than I thought to fashion pawl springs from a stainless steel .012 guitar string. Just needed needle nose pliers and wire cutters. An advantage is being able to bend the foot in the direction you need for on top of the pawl mounting.