He hasn't said what parameters the recorders will keep on recording and how that works.
Obviously, current boxes wouldn't record a thing, but you could add some gyros to them to get them record accelerations... Some aircraft used to have a separate simple pitot-static system in the bum for their rudder travel limiters... could easily be done to feed an FDR. ...But why?
If the ship is
completely dead, electrically, what a self-powered FDR might record (on a FBW aircraft!) beyond that point is totally predictable anyway, isn't it?
(BTW... "West of the Moon" I get, since the Moon always shows us the same side... But "East of the sun"? Yer 'aving us on!
)