Executive summary
Why the ATSB undertook this research
Following several helicopter rotor wash incidents at hospital helicopter landing sites (HLSs) that resulted in injuries to nearby pedestrians, the ATSB compiled a list of similar incidents in the preceding 5 years. Analysis of the specific occurrences was conducted to identify the common factors, existing regulatory guidelines, and ways to mitigate the effect of rotor wash.
What the ATSB found
Of the 18 helicopter downwash incidents reported in the last 5 years, 9 were reported to…