1. A method of analyzing an engine unbalance condition, comprising: receiving vibrational data from a plurality of locations distributed over at least one of an engine and a surrounding engine support structure; inputting the vibrational data into an ANNCV; using the neural network inverse model, establishing a relationship between the vibrational data from the plurality of locations and an unbalance condition of the engine; and outputting diagnostic information from the ANNCV, the diagnostic information indicating the unbalance condition of the engine.