Faulty RA
This is what the MEL states, and why in retrospect it is important to check this even before commencing, or even to execute a missed approach, to get the full picture with respect to downgraded equipment on an A/C. As most pilots does`t know the contents of the MEL by recall/Memory.
:With radio altimeter(s) inoperative, do not use the associated autopilot or Autothrottle for
approach and landing.
Still we do not know if this particulare fault had been adressed by the flight crew in this accident before or during the approach. It might even been this fault that had pussled them, and taken their attention away.