Grit dog wrote:
If there truly is 1/2" plywood behind the paneling on the "inside" of the wall (this does not sound right, sounds too heavy to be true. Outside should have plywood, but, anyway...)
Then just some good mollys into the plywood will hold up a little TV, especially if it's direct mount and not on a swivel mount, which will exert more bending moment on the connection. What you have done is more than sufficient and will never come loose from the rv wall. You're good.
It's quite possible that there are plywood backers behind the luan in various places but not the entire wall. Perhaps it was put in there because they expected someone may want to mount a television in that spot, or something like that. :)