Is this fatal? Cracking parts on my hull

Took the starboard hull off today. Only took that one off, due to logistics.

Here's what I found...two loose screws, and one screw almost totally unscrewed

this is the aft endcap...the one with the most exterior glass damage...

http://s736.photobucket.com/albums/xx10 ... ap2.jpg%26

and this next one is forward-starboard endcap, exactly as I found it...I don't know why this one would be loose...

http://s736.photobucket.com/albums/xx10 ... ap1.jpg%26

after reviewing send4help's photos of the end caps being loose I decided to dis-assemble my 17. Good thing. Only one of the 4 end caps was actually screwed down tight. I was able to move the other three from an 1/8 to almost 1/4 inch. All the screws were loose. (yeah, mine too ) I removed the screws and shot a little two part semi-flexible epoxy into the holes and re-mounted the end caps. Now I will reassemble and find something else that needs fixing PS - thanks Dan!

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The fact that this windy world is largely covered in water obviously means that man was meant to sail.