Glass is most likely slid into the wing frame and held with setting tape. Other than breaking it out it can be a bear to remove. If you want to try removing the glass intact it will probably require removing the wing frame to prevent springing or damaging the assy.
Removal of the entire wing depends on whether it is the crank out type or the push out type. I am not familiar enough with the crank type to give much info.
Both types probably have a tapered screw thru the door frame or a piece welded to the door frame at the top which acts as an upper pivot. The bottom on the push out generally is a square shaft going thru a hole in the door frame. It probably will have a nut, washer, spring and a couple of locating tabs to prevent the wing from opening too far. Removal of that type is accomplished by removing the nut and associated parts on the bottom, pivot screw on top and then tilting and pulling the entire window out of the door frame.
There are some decent instructions on wing removal and glass work starting about page 9 in the body section of the 46-50 manual. That would also include the 41-2 Clipper. AFAIK, Packard didn't provide any detailed prewar conventional body info and I don't know how similar the 39 conventional body is to the Clipper or postwars.. In case it is you might check out the postwar information to see how it compares to yours.
packardinfo.com/xoops/html/downloads/servicemanual4650/Section4.pdfThis Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=183750