RE: Seagull Models Edge 540
Since you're pulling out the cover of wing, inspect the spar for gaps, and specially for components that aren't properly glued (some people had problems with that kind of things).
I'm not sure, but I think the wings broke in flight somewhere near the second profile. I think you'll have to make an assessment regarding the condition of the construction of your wing.
In my case I just, decided to reinforce the wing as a precaution.