the fatal mistake COULD have been to select the prime pumps to on by mistake in the dark instead of the transfer pumps, of course IF the CAD was working the cautions would have shown the error if the pilot looked to verify his action
How often do people flip the wrong switches, only to be 'pulled up' by the CAD? Anyone done it? If it happens a lot then CAD fault alone might give us two slices of cheese lined-up.
Would the CAD failure take out any of the other subsequent warnings?
edit: Looking at the panel in post 2192, I guess, if you did not intend to flip those switches, you would be at most one switch out, and get one of each.
To actually flip the wrong pair would suggest being confused as to the position on the panel of the pair you want.