My PA-24 rear passenger side air vent will not stay closed (not to bad in the summer, not so good in the winter). I have noticed in the other three vents a dime sized piece of metal with raised bumps that hold the vent in the selected position this piece is missing in the faulty vent. I have searched the tips book, but find no information for repairing or replacing these vents. If I must replace this vent is there a source for how to do it and a source for parts??
Any information would be a great help.
Duane