It's a good idea to inspect any Lippert frame for cracks and bad welds. Mine failed on my 2010 Keystone Cougar in 2010 - fourth trip out. Dropped the 5er onto my truck bed while going down the highway.
2010 Cougar 322QBS 5er
2001 Dodge 2500 Quad, 4x4, 360 gas, 4.10, auto - SOLD
2002 Dodge 2500 Quad, 4x4, 5.9L Cummins, 3.55, auto - SOLD
2007 Dodge 3500 SRW Mega, 4x4, 5.9L Cummins, 3.73, auto - SOLD 2014 RAM 2500 Crew Cab, 4x4, 6.4L Hemi, 4.10, 66RFE auto
Everyone should inspect their frames. Especially if it is Lippert. I have some nice photos I would love to share of my Lippert frame failure. The inspection is quite easy and will take very little time.