Hey all just a reminder:
All areas of a ship are in zero-g, that includs the maintenance passages. Unless it's stated in the starship article that an area isn't, then it's alright to assume it is.
The only areas of a ship that wouldn't be zero-g, is the crew quarters (the cabins themselves) and the cafeteria.
Now, naturally, the only time these areas would cease being zero-g is when on a planet.