Interior trim/header sag in the middle

[Inused14]

Please help i wonder how can i fix this trim it has a half inch gap between the sag in the middle i don't know what to do and where to start...

[dvspl]

That whole trim piece is just stapled to the structure of the slideout behind it. The whole piece in my 29MV fell down to the ground while driving on a particularly rough stretch of I-287 in NJ. I used a small brad nailer with some wood glue to put it back together the right way, then reattached it to the slideout with wood screws. You can probably just pry it off, put it back together and reattach it in the right location.

[Inused14]

Thank you for the time teaching me i will do it this coming weekend because my travel camper is in camp site i will do my best to put it back to where it was.