Thanks Chuck for posting the TSB and Jeff and Monty for the explanation. After reading it and looking at the pictures posted, I think I have a problem.
http://www.montanaowners.com/forums/...ad.php?t=78012
https://m.facebook.com/groups/274058...85342848522789
When we were at the rally my neighbors had the same bulge in their wall next to the bedroom slide. They had a LCI tech come and check it out. They were told no problem. So I had LCI tech come and have a look at mine so it was documented. He also told me no problem. I have looked at other models and there is no bulge in the wall. I will be contacting Keystone and sending them pictures. I'll let you know how it goes.