The Right hand latch lock will not unlock with the key. Just turns a quarter turn. I’m suspecting the inter arm has loosen and not connected to the key any more. Any ideas how to fix this?
Is there access to the inside of the door to look at the latch bar on the tumbler assemblies? I'm sure you tried the push giggle the door. Maybe try raising the door again, with maybe a a little help from a strategic placement of a pry bar. An ample amount of spray lube in to the lock cylinder. Hope this helps.