An EC145 made a transfer on the 8th September 2017 from Sentara Albemarle Medical Center, Elizabeth City, NC. The helicopter from air ambulance crashed at 11:20 local time into a field close to a wind farm near Hertford, North Carolina, USA.
 
Several witnesses observed the helicopter in flight, reporting a smoke trail shortly before the accident occurred. The helicopter was equipped with a flight-data system, but no data could be retrieved.
 
The flightpath could be reconstructed, by using the iwi-methodology, based on the witness statements combined with data from the sky-connect tracker.
 
The NTSB published its final report in February 2021, concluding that the number 2 engine had a technical failure. The analysis of the wreckage and the reconstructed iwi® flight path accord, that the helicopter started to fall almost vertically at 500 feet AGL.

https://data.ntsb.gov/Docket?ProjectID=95967​