More details re Lion Flight JT610's accident
From the time take-off was first recorded on radar at an altitude of 350ft at 232110 UTC approximately 50 radar "hits" appear over a period of 10 minutes 35 seconds. The first apparent anomaly occurred between 80 and 105 seconds when the flight seems to have dropped from 2050 ft to 1475 ft. Having reached 5,350 ft at the 3'30" mark the flight fluctuated around and a little above 5,000ft until the 8'15" mark when it appears to have dropped to 4,500ft before regaining altitude to 5,450ft at the ten minute mark.
The last three hits spell out the tragedy all too clearly.
At 10'15" from first radar hit the flight was at 4,900 ft and ten seconds later at 10'25" was at 4,850 ft. The final radar hit, at the 10'35" mark (233145 UTC) shows an altitude of 3,650 ft, a 1,200 ft drop in 10 seconds; 7,200 ft per minute.
Likely it may take months, even years to find out what happened. The pressure will be huge given the amount of orders that are pending.
Being in Canada and with our national airline in the process of preparing to switch much of it's mainline service to the 737Max8 there is considerable concern and interest in the outcome of the investigation.