Your trailer has a "floating" rear wall. In units with a rear window, there is some added support from the window flange squeezing the window frame.
Without a window, I wouldn't know where any framework would be and Keystone doesn't publish that information. Your best bet IMO is to remove the top screw rail to expose the upper edge of the filon. From there you may see what "failed" and easily formulate a repair plan.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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