On Monday, March 11, 2019 at 5:27:02 PM UTC-4, Duster wrote:
Video stills recorded the tug's elevator position.

Where are you able to see the video footage?

BG

See if you can open these files.

https://dms.ntsb.gov/public/62000-62...018/622033.pdf
https://dms.ntsb.gov/public/62000-62...018/622036.pdf
For the full video, make a FOIA request to the NTSB or via the FAA. They've been willing to assist, though there are nominal fees in some cases. In my experience, they won't ask for a justification, though providing one might help.

Everything you need is in the video analysis. Good job by the analyst. Experienced tow pilots & glider instructors can figure it out from here.

T8