Join Date: May 2005
Location: Exiled in Surrey
My Motorhome: Rapido 7066DF
Thanked 269 Times in 220 Posts
Definitely a dealer job if you have a warranty.
The steps are often bolted straight to the floor which puts that section of the floor under severe stress, especially if the steps are used by "large" or careless persons. This can cause the floor to de-laminate, allow water ingress and eventually fail completely.
Get it checked out right away.
Help someone out when they're in trouble and they'll remember you when they're in trouble again.