EHEST Leaflet HE 1 Safety Considerations

This Leaflet covers the following subjects:

  • Degraded Visual Environment (DVE),
  • Vortex Ring State (VRS),
  • Loss of Tail Rotor Effectiveness (LTE),
  • Static & Dynamic Rollover,
  • Pre-flight planning Checklist,

Data from the EHSAT analysis report of European helicopter accidents occurred between 2000 and 2005 confirm that a continuing significant number of helicopter accidents are due to pilot disorientation in DVE, VRS, LTE and Static & Dynamic Rollover.
This leaflet provides pilots with relevant information on each of these topics and highlights the importance of pre-flight planning.

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