1994 Aljo 27 5 th wheel trailer wall construction?

[West_Adventures]

The roof is a one piece aluminum  and I've noticed the spring that on the edge of the ceiling the joint molding is wrinkled about 2 inches from edge? I was wondering if the walls studs were aluminum or wood ? I see I might have some water damage around the oven vent? I just trying to educate myself on what kind of repairs am I looking at? 

Thanks, Steve

[JIMNLIN]

My first 5th wheel rv trailer was a new 1984 26' Aljo Aries. Roof /sidewalls front and back were wood ribs with white aluminum roof . No aluminum ribbed structure.