Is there an average or "target" timeline on when they might be done?
This very topic on Airliners.net has over 700 replies. Has the aircraft rate of decent, flight path over Trinity Bay, crew coms, air traffic control coms. Feel free to wait for the NTSB report.
They do not pressure themselves with limitations. They will be done when they are done.
None of that means much in the arena of what caused the crash. There is even a few seconds of video with the plane steep nose down and the water splash. None of that tells why.
I still haven't seen the video. The only one out there so labeled seems to show a Guardian helo hovering and nothing else.
Was it a Boeing or an Airbus that had some kind of software glitch that caused pitch downs?
I have not seen the physical video either. It is referenced in reports as a security video showing the later part of the event.
I have seen 2 videos now. Both from security cameras. This shows the best view.https://www.foxnews.com/us/final-moments-before-amazon-prime-air-plane-crashed-in-texas-captured-on-video