For those with aviation interest, the NTSB issued a preliminary report on 2/7, located here:
https://www.ntsb.gov/investigations/...ive-Update.pdf
What I found most curious is Figure 2b, which is a 3-D reconstruction of the last part of the flight from ADS-B data. Why the descending left turn at the end of the flight? Nothing the pilot said to ATC indicated he was going to do that, and nothing they found so far indicated mechanical malfunction. Any ideas or theories? I suppose we'll have to wait for the final report (which usually takes more than a year).