A local approach to LPV (Linear Parameter Varying) identification of a Twin Rotor MIMO System (TRMS) is considered via grey-box modeling. A white-box model of the TRMS is derived from the first principles, and black-box models at local operating points are given by a closed loop subspace identification method. Local black-box models that have consistent states are obtained by means of a frequency domain subspace method with the knowledge of the white-box model, and an LPV model is computed by interpolating the consistent local state-space models. © 2011 IFAC.