Helicopter Safety Study 3 (HSS-3) is a Norwegian joint industry research project established in 2008. The main objectives of the study are to assess the risk level associated with offshore helicopter transportation, propose indicators to monitor safety, and identify safety measures for further improvement. The study will address risk through two complementary approaches: one using risk influence modeling and one focusing on resilience engineering. This paper presents preliminary results from a comprehensive review of recent developments relevant for helicopter safety. These developments affect a set of risk influencing factors (RIFs -including technical, human and organizational factors) in an existing risk influence model in two ways. Firstly, the model is modified to include new aspects that have emerged in the study period 1999-2008. Secondly, the developments will form the basis for expert judgment sessions to update the risk contribution of each RIF in the model.