Lone
The FDR does not have it because it's data is sourced from widely distributed avionics or sensors. So if they are gone there is nothing to record. On the CVR the RIPS also powers the area mic so at least something may be recorded if that path stays intact. There was an effort to have two dual recorders, one in front and one in back on large airplanes to get something if the fuselage is compromised (TWA 800).
The Sultan