Loose roof membrane

It's supposed to be glued down tight. It would seem that it has a piece of loose trim and dicor if it's letting that much air in. The ugly answer is remove everything and re glue the whole thing. You need to look at the overall codition of the epdm to see if it's worth saving. But you also dont know if water has gotten I and damaged the wood. My sons trailer had a small leak near the AC unit. It needed less than a sheet of plywood to patch it. He had gotten $5,000 price to do the new membrane and replace any wood and a $3,500 price if they removed the front trim and cut the membrane back to the ac. He chose option 3 and we cut it ourselves and patched in the plywood, glued down the epdm and stapled the seams and dicored it. It's been over 2 years and everything is fine. It's a half A way to do it but he's getting rid of it or parking it at a hunt camp. Seems like you have a big job or big bucks OR cobble for the time being. If I was keeping the rig and going to put a new membrane on later, I'd be putting a zillion staples and dicor on it if it meant going on vacation. Dicor. Eternabond tape. Staples. Strips of something stapled down and dicored. Anything just so it's water tight, not loose and I get to go on vacation. I could then strip it when the party is over.