California Shock/Trauma Air Rescue (Calstar) has completed requirements for a supplemental type certificate (STC) to re-engine the Eurocopter BO 105LS with a Rolls-Royce 250-C30. The engine modification will allow the McClellan, Calif.-based organization’s BO 105LS to provide service at higher altitudes throughout the mountainous Sierra Nevada region. In partnership with Aerometals of El Dorado Hills, Calif. (Booth No. 4113), Calstar also plans to offer for sale a conversion kit based on the STC.