I’ve been meaning to post this for awhile. I have a 77 J model with the earlier style baggage door latch. I didn’t like the thought that there was only one exit from the cabin in case of an emergency. I also noticed on later models Mooney added the interior emergency exit latch on the baggage door. Initially I thought I would add that latch to my door but when I researched further, it turns out the door latch is completely different on the newer doors with the interior mechanism. You could probably swap to a newer door with the new latch but that route has its own challenges with door fitting and repaint matching.
I devised a simple design that is a minor modification to the inside plastic panel of the baggage door. I simply cut a hole in the panel in the area of the door pin latch mechanism center crank link. The link has two nuts that attach to each door pin rod-end. I made a simple handle that engages these nuts, and I attached it with a lanyard to the inside of the door. I finished the mod off with a cover for the hole (felcro’d on), a placard explaining the operation, and a piece of Velcro to hold the handle. It’s not an easy egress, but better than nothing….
Pictures showing this are attached.