This thesis consists of the first 3-D application of an Eulerian droplet impingement code. The code, DROP3D, was developed at the CFD Laboratory at Concordia University by Professor Yves Bourgault. DROP3D is part of an integrated in-flight icing package, FENSAP-ICE, under constant development at the CFD Laboratory allowing aerodynamic performance degradation and ice accretion analysis as well.  Code validation results in both 2-D and 3-D are presented and discussed. Results of a 3-D analysis over a Convair-580 nose and cockpit geometry are presented as well. This 3-D analysis is actually a simulation of a flight segment of the Canadian Freezing Drizzle Experiment as conducted by the Atmospheric Environment Services. Special emphasis is given to side window impingement on the Convair-580. The Eulerian approach's advantages over the classical Lagrangian approach are also discussed.