Without seeing pictures, I would say that the covering was damaged in the area where it gave way. Two of our club members have Kyosho planes and both have suffered the covering ripping at locations other than the seam. Tha damage could be as simple as sagging covering ripping do to the covering fluttering in the airsteam. I would suggest this before I would suggest that the covering just gave way in a no seam/glue related area.