OK, the first one I can understand to some extent, because these planes have a new system that can force the nose down to avoid a stall and if the system malfunctions, the pilots may not react properly, per Boeing the pilots were not told and trained that the system exists. But at the same time, all pilots are trained on what to do for runaway trim, which is what this is. Runaway trim is when the electric trim system on any play runs amok and forces the plane nose down or nose up. So after the Lion Air, the whole world knows about this potential problem, why did this just happen again? The pilot had 8000 hours, the co-pilot just 200. But flying this plane, you'd think they would know about this and be able to react properly. On the other hand, it's also shocking that Boeing designed this system into this new plane and it relies only on one angle of attack sensor. The plane can be flying normally, all other sensors indicate everything is normal, and because one AOA sensor is faulty, it points the plane towards the ground. You'd think it would check the other AOA sensor, other flight parameters, etc and then issue some kind of notice or warning to the pilots, not nose dive the plane on one faulty sensor. Of course we still don't know what really happened, but it sure looks like the same stupid thing all over again.