Well from now on maybe they should sit in the Jump seats for landing and be an active part of the crew. Who knows maybe one might have seen the thrust at idle and the speed decaying in time to alert the bozo "flying" the thing..
In our mob generally speaking all crew members sit in the cockpit for T/O and LDG unless other circumstances are needed. Indeed the relief crew take an active part in both pre flight and post flight setups.
Yes I know it's a 2 crew Aircraft but many hands make light work and the safety implications are blindingly obvious
