Also, protection provided by EGPWS/TAWS is significantly different depending on position source information. GPS direct is best.....FMS (even with GPS in the suite) is a "degraded" position.
Does anyone know.....what is the position source on the aircraft/interface on this aircraft?
The facts to date do not support this as a major factor, but.........as usual, wait for the (hopefully) unbiased factual/final report.
Has the NTSB asked to be party to this investigation?