This documents the operational safety study on one of the Top 5 Network Manager operational safety priorities for 2015/2016 - “Sudden High Energy Runway Conflict (SHERC), and serves as a reference for the Network actors in case they undertake operational safety analysis and improvement activities for Sudden High Energy Runway Conflict (SHERC) events. This document serves as a reference for the Network actors in case they undertake operational safety analysis and improvement activities for Sudden High Energy Runway Conflict (SHERC) events.