Preliminary report is out - https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/199620/pdf
Main point is safety reported events were frequent and not acted on. Resolution advisories each month near DCA involving helicopters.
Video discussing this -
Main point is safety reported events were frequent and not acted on. Resolution advisories each month near DCA involving helicopters.
Video discussing this -
