Re: Galley/kitchen unit
It may well have been robust enough to resist fragmentation while falling (free, on its own), but probably not strong enough to resist high speed air mass.
But being light and very stiff (sandwich construction, sic!) it'd slow down very quickly perhaps without significant damage... drastically & rapidly reducing airloads to minor free-fall conditions i.e.. it would be blown backwards very fast negating air-load build-up from total Q
Alternatively, if happened to be at the open end of broken fuselage and sinking, buoyancy might well release it to the surface.