I have a similar problem with one side of mine where it appears part of the bracket that attaches to the frame/floor of the RV has broken. I would imagine each mfgr. has a different design where some steps come out easy, and others don't. In my case it looks like I have to remove or un-attach and push aside part of the bottom siding panel to gain access to the nuts that hold the step in place so I can take the entire step assembly off to have the bracket re-welded. I doubt it's more than a 10 minute fix to weld, but at least an hour's worth of work to get to the problem.
--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears
--2016 Montana 3711FL, 40'
--SOLD 2014 Wildcat 327CK, 38'