Pull a few more screws above it to give some flexibility to clean up the old putty under the damaged trim and assess the framing. The trim is a soft aluminum and can be easily straightend. Get some new putty tape to put under the trim. Screws can be reinstalled between the original holes in the corner molding. They are self drilling, does'nt take much force tog through the trim. The new putty tape should squeeze out of the old screw holes sealing them up. As a side note, looking at the old dried and cracking putty, the whole trailer should be resealed at all the moldings and joints or water intrusion is not far off. Not hard just a little time consuming but will greatly extend the life of the trailer. Most likely wood frame with fiberglass insulation and will soak up and hold water like a sponge.
