NTSB investigation chairman (may have her title incorrect) shared auditioned & preliminary summary info from their review of the data. No mechanical problems indicated. Throttles were at idle on the approach; speed dropped below target speed; someone in the cockpit requested increased speed six seconds before the crash; speed increased three seconds before the crash; voice request for go-around made at 1.5 seconds before the crash.

My read based on the facts shared at this point: Pilot error, but the NTSB said they do not have all the facts yet, and are not yet ruling anything out.