Missable. In Chapter 7, make a save file BEFORE you board the Solar Array Elevator. Once you board it, necromophs known as Tripods will begin to latch onto the windows shortly after. If you have a decently upgraded Detonator and you may be able to achieve this on your first playthrough but it is still very tough even on Casual difficulty. Otherwise, I recommend doing this on New Game+ with a decently upgraded Contact Beam's ALT attack.
Strategy from TheCollectiveX: Use Detonator to fire Mines directly at the Tripods and knock them out flat.
Video by PowerPyx.