Originally Posted by
Uplinker
@ punkalouver; exactly. Of course the main approach briefing should be completed before TOD. Not doing so was their first hole in the cheese.
Not monitoring the aircraft or the instruments was their second.
Millions of flights happen each year. It is inevitable that a runway change will happen or a new STAR, etc. It is not necessarily an error to end up making a briefing after top of descent. I don't know what happened in this incident but I doubt they just waited until a fairly low altitude to start the briefing. It is more likely that the first mistake was not monitoring their instruments, which should be done by the briefer as PM.