Maybe your lock is like many used on DP coaches?
If so you may only need a lock adjustment? I.e., if that paddle is flopping and does not catch, then all you need to do is...
* Separate the lock halves by unscrewing the inside star bolts.
* With the door open, remove the inspection cover on the edge of the door. It's just a thin plate that measure about 1"x1".
* Remove the locking nut using a 1/8" drive, 7/16" deep socket.
* Separate the lock halves.
* Bend the tap on the outside half of the locking plate... down just a tad.
* This will allow the lock to engage again.
* Reassemble and follow the adjustment instructions after you read more about these locks in one of these other threads:
1)
https://www.winnieowners.com/forums/...rk-358744.html
2)
https://www.winnieowners.com/forums/...re-330834.html