The Frozen Fuel Line is an object in Metroid Prime Hunters, found running under the floor in the Weapons Complex room on the Vesper Defense Outpost. Since there are signs of structural failure according to its Logbook entry when scanned, the fuel lines are presumably the cause for the station's freezing over, or at the very least a contributing factor. The fuel line cannot be physically interacted with, or repaired by Samus, and is part of the room.
Logbook entry[]
Frozen Fuel Line
Metroid Prime Hunters
Logbook entry
Pipes shown signs of structural failure.