[Steve48]

I have been locked-out of basement due to the pot metal lift piece breaking three times.
I use a large screw driver to pry door out as much as I can from underneath coach.
This will expose the metal tamper proof box, then drill a hole through that metal box
in the center so you can push the latch up with a smaller screw driver to clear strike.
Then door should pop open, without ruining the lock or your door.
I have full body paint so I just replace the broken piece on the latch which I bought from GS parts dept.
The new latches are black & don't match.
Also try to keep the drill bit off the weatherstripping!