DuoTherm AC leaking water into the coach from one long bolt

As always thank you to all the great posters at rv. Net for excellent advice on our leaky Duo Therm air conditioner. I did tighten up the nuts a little bit it hasn't rained all day and the water leakage is stopped so I think it is that pesky roof seal. I'd say after 20 years that thing is pretty well shot and I'll get it replaced when we return. thanks all of you kindly