Maintenance Shaft AU is a room in the floating cloud-city SkyTown, of planet Elysia in Metroid Prime 3: Corruption. It is a fairly long but small room that is the south-eastern room of the Aurora Unit complex.
The room consists of two ledges at each end, seperated by a large gulf that can only be crossed via a higher ledge in the centre of the room. At each edge of this section is a Grab Ledge. On the south wall are several Chozo runes that are very similar to the appearance of the Chozo Artifacts of Tallon IV and glow a bright turquoise. Many Sky Puffers patrol the room and can make progression very hazardous.