Re: here.....
According to spaceflight now:
The Faint Object Camera was the last of Hubble's instruments to use COSTAR, the set of corrective optics installed in 1993 that counteracted the spherical aberration of the telescope's primary mirror. COSTAR's optical bench already has been stowed and it will be replaced by another science instrument during the next Hubble servicing mission.
So it will be left dormant. (just one § in awhole article).
Raoul