For weeks I could not figure out how the ceiling panels were attached to the ceiling. After a lot of prying around, I succeeded in removing one long, narrow side panel, but only after removing the cabin ceiling panel first. It was friction fit and capped by the cabin panel.
I wonder how the interior held it out for 20 years; most of the work I’ve seen sofar is minimal at least. This panel is held up by 3 open clips and 2 screws. In the left rear, you can see the other long, narrow side ceiling panel.