Slight correction-- there were a number of the poor design trailing arms that were replaced with more poor design trailing arms.
You need to verify (very easy visually)that the new DESIGN trailing arms were used-- either from Source Engineering (the stronger ones) or the NEW Monaco Corp (likely quite adequate and a big improvement over the original ones.
Pictures and complete description:
http://community.fmca.com/topic/569-important-safety-problem-monaco-holiday-rambler-safari-chassis/?hl=%2Bmonaco+%2Btrailing+%2Barm