[Tiara Sovran] Replacing courtesy lights in cabin steps

[Dlaporte58]

I have the same question about almost all the lights. How do you get the trim rings off without breaking them or damaging whatever the fixtures are mounted to? Most look like they just twist off, but don’t seem to. The ones over the galley and under the cabinets to starboard just twist off, but I can’t figure out the ones mounted on the front of the stairs, onto the headliner or in the cockpit. The light fixture with the plunger switch under the top stair also needs replacing.