Mach,
If they had set alt sel to 0 and press LVL CHG they'd come all the way down. If they had pressed LVL CHG and a certain alt sel (above 3kft) the airplane would capture that selected alt.
The problem is that advertised 6kftpm ROD is an average. It varied much more than that (all I can say).
We have to wait fo the preliminary report to figure what happened. At least to have an hint about.
Last edited by Jetdriver; 6th Dec 2013 at 15:10.