Originally Posted by
bobbytables
Don't believe B737 has a pilot response warning or anything similar.
At the end of the route I think you get FMC message and autopilot stays on. Nothing particularly loud that I'm aware of.
Comms and radar coverage spotty in this part of the world. Addis probably wasn't aware they weren't descending until they were tens of miles out.
Cabin crew should be checking though. Maybe Ethiopian don't do that or let it slip.
Unlikely...ADD radar and comms are quite good. Plus I believe they have ADS-B and should have been quickly able to identify the plane wasn't descending or programmed to descend as it was supposed to by that point.