The NTSB held an investigative hearing last week with witnessess from Southwest, Boeing, CFM and FAA. The public docket was also opened which has inteviews with the flight and cabin crews and passengers, CVR transcript and FDR data. The link to the hearing page, which in turn has a link to the docket, is
https://www.ntsb.gov/news/events/Pag...8MA142-IH.aspx